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authorGlen Barber <gjb@FreeBSD.org>2016-11-03 22:50:41 +0000
committerGlen Barber <gjb@FreeBSD.org>2016-11-03 22:50:41 +0000
commit8a1be49ef66d408ec0591e5d86f22706ccbf76da (patch)
treeee9c098d29bb2140f372cebf4c78485baaff85e1
parent4dddcb12459a28675cc6bae4758d89cd76064d4c (diff)
downloadsrc-8a1be49ef66d408ec0591e5d86f22706ccbf76da.tar.gz
src-8a1be49ef66d408ec0591e5d86f22706ccbf76da.zip
Import tzdata2016i.vendor/tzdata/tzdata2016i
Sponsored by: The FreeBSD Foundation
Notes
Notes: svn path=/vendor/tzdata/dist/; revision=308265 svn path=/vendor/tzdata/tzdata2016i/; revision=308266; tag=vendor/tzdata/tzdata2016i
-rw-r--r--CONTRIBUTING73
-rw-r--r--LICENSE4
-rw-r--r--Makefile793
-rw-r--r--NEWS3782
-rw-r--r--README71
-rw-r--r--Theory840
-rw-r--r--antarctica7
-rw-r--r--asia17
-rw-r--r--australasia18
-rw-r--r--backzone677
-rw-r--r--checklinks.awk48
-rw-r--r--checktab.awk177
-rw-r--r--europe145
-rw-r--r--leapseconds.awk76
-rw-r--r--version1
-rw-r--r--zone.tab3
-rw-r--r--zone1970.tab3
-rwxr-xr-xzoneinfo2tdf.pl52
18 files changed, 6712 insertions, 75 deletions
diff --git a/CONTRIBUTING b/CONTRIBUTING
new file mode 100644
index 000000000000..e40102e693e3
--- /dev/null
+++ b/CONTRIBUTING
@@ -0,0 +1,73 @@
+Contributing to the tz code and data
+
+The time zone database is by no means authoritative: governments
+change timekeeping rules erratically and sometimes with little
+warning, the data entries do not cover all of civil time before
+1970, and undoubtedly errors remain in the code and data. Feel
+free to fill gaps or fix mistakes, and please email improvements
+to tz@iana.org for use in the future.
+
+To email small changes, please run a POSIX shell command like
+'diff -u old/europe new/europe >myfix.patch', and attach
+myfix.patch to the email.
+
+For more-elaborate changes, please read the Theory file and browse
+the mailing list archives <http://mm.icann.org/pipermail/tz/> for
+examples of patches that tend to work well. Ideally, additions to
+data should contain commentary citing reliable sources as
+justification.
+
+Please submit changes against either the latest release in
+<ftp://ftp.iana.org/tz/> or the master branch of the experimental
+Git repository. If you use Git the following workflow may be helpful:
+
+ * Copy the experimental repository.
+
+ git clone https://github.com/eggert/tz.git
+ cd tz
+
+ * Get current with the master branch.
+
+ git checkout master
+ git pull
+
+ * Switch to a new branch for the changes. Choose a different
+ branch name for each change set.
+
+ git checkout -b mybranch
+
+ * Edit source files. Include commentary that justifies the
+ changes by citing reliable sources.
+
+ * Debug the changes, e.g.:
+
+ make check
+ make install
+ ./zdump -v America/Los_Angeles
+
+ * For each separable change, commit it in the new branch, e.g.:
+
+ git add northamerica
+ git commit
+
+ See recent 'git log' output for the commit-message style.
+
+ * Create patch files 0001-*, 0002-*, ...
+
+ git format-patch master
+
+ * After reviewing the patch files, send the patches to tz@iana.org
+ for others to review.
+
+ git send-email master
+
+ * Start anew by getting current with the master branch again
+ (the second step above).
+
+Please do not create issues or pull requests on GitHub, as the
+proper procedure for proposing and distributing patches is via
+email as illustrated above.
+
+-----
+
+This file is in the public domain.
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 000000000000..148eb232b673
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,4 @@
+With a few exceptions, all files in the tz code and data (including
+this one) are in the public domain. The exceptions are date.c,
+newstrftime.3, and strftime.c, which contain material derived from BSD
+and which use the BSD 3-clause license.
diff --git a/Makefile b/Makefile
new file mode 100644
index 000000000000..74b950cb58a9
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,793 @@
+# This file is in the public domain, so clarified as of
+# 2009-05-17 by Arthur David Olson.
+
+# Package name for the code distribution.
+PACKAGE= tzcode
+
+# Version number for the distribution, overridden in the 'tarballs' rule below.
+VERSION= unknown
+
+# Email address for bug reports.
+BUGEMAIL= tz@iana.org
+
+# Change the line below for your time zone (after finding the zone you want in
+# the time zone files, or adding it to a time zone file).
+# Alternately, if you discover you've got the wrong time zone, you can just
+# zic -l rightzone
+# to correct things.
+# Use the command
+# make zonenames
+# to get a list of the values you can use for LOCALTIME.
+
+LOCALTIME= GMT
+
+# If you want something other than Eastern United States time as a template
+# for handling POSIX-style time zone environment variables,
+# change the line below (after finding the zone you want in the
+# time zone files, or adding it to a time zone file).
+# (When a POSIX-style environment variable is handled, the rules in the
+# template file are used to determine "spring forward" and "fall back" days and
+# times; the environment variable itself specifies UT offsets of standard and
+# summer time.)
+# Alternately, if you discover you've got the wrong time zone, you can just
+# zic -p rightzone
+# to correct things.
+# Use the command
+# make zonenames
+# to get a list of the values you can use for POSIXRULES.
+# If you want POSIX compatibility, use "America/New_York".
+
+POSIXRULES= America/New_York
+
+# Also see TZDEFRULESTRING below, which takes effect only
+# if the time zone files cannot be accessed.
+
+# Everything gets put in subdirectories of. . .
+
+TOPDIR= /usr/local
+
+# "Compiled" time zone information is placed in the "TZDIR" directory
+# (and subdirectories).
+# Use an absolute path name for TZDIR unless you're just testing the software.
+
+TZDIR_BASENAME= zoneinfo
+TZDIR= $(TOPDIR)/etc/$(TZDIR_BASENAME)
+
+# Types to try, as an alternative to time_t. int64_t should be first.
+TIME_T_ALTERNATIVES= int64_t int32_t uint32_t uint64_t
+
+# The "tzselect", "zic", and "zdump" commands get installed in. . .
+
+ETCDIR= $(TOPDIR)/etc
+
+# If you "make INSTALL", the "date" command gets installed in. . .
+
+BINDIR= $(TOPDIR)/bin
+
+# Manual pages go in subdirectories of. . .
+
+MANDIR= $(TOPDIR)/man
+
+# Library functions are put in an archive in LIBDIR.
+
+LIBDIR= $(TOPDIR)/lib
+
+# If you always want time values interpreted as "seconds since the epoch
+# (not counting leap seconds)", use
+# REDO= posix_only
+# below. If you always want right time values interpreted as "seconds since
+# the epoch" (counting leap seconds)", use
+# REDO= right_only
+# below. If you want both sets of data available, with leap seconds not
+# counted normally, use
+# REDO= posix_right
+# below. If you want both sets of data available, with leap seconds counted
+# normally, use
+# REDO= right_posix
+# below. POSIX mandates that leap seconds not be counted; for compatibility
+# with it, use "posix_only" or "posix_right".
+
+REDO= posix_right
+
+# If you want out-of-scope and often-wrong data from the file 'backzone', use
+# PACKRATDATA= backzone
+# To omit this data, use
+# PACKRATDATA=
+
+PACKRATDATA=
+
+# Since "." may not be in PATH...
+
+YEARISTYPE= ./yearistype
+
+# Non-default libraries needed to link.
+LDLIBS=
+
+# Add the following to the end of the "CFLAGS=" line as needed.
+# -DBIG_BANG=-9999999LL if the Big Bang occurred at time -9999999 (see zic.c)
+# -DHAVE_DECL_ASCTIME_R=0 if <time.h> does not declare asctime_r
+# -DHAVE_DIRECT_H if mkdir needs <direct.h> (MS-Windows)
+# -DHAVE_DOS_FILE_NAMES if file names have drive specifiers etc. (MS-DOS)
+# -DHAVE_GETTEXT=1 if 'gettext' works (e.g., GNU/Linux, FreeBSD, Solaris)
+# -DHAVE_INCOMPATIBLE_CTIME_R=1 if your system's time.h declares
+# ctime_r and asctime_r incompatibly with the POSIX standard
+# (Solaris when _POSIX_PTHREAD_SEMANTICS is not defined).
+# -DHAVE_INTTYPES_H=1 if you have a pre-C99 compiler with "inttypes.h"
+# -DHAVE_LINK=0 if your system lacks a link function
+# -DHAVE_LOCALTIME_R=0 if your system lacks a localtime_r function
+# -DHAVE_LOCALTIME_RZ=0 if you do not want zdump to use localtime_rz
+# This defaults to 1 if a working localtime_rz seems to be available.
+# localtime_rz can make zdump significantly faster, but is nonstandard.
+# -DHAVE_POSIX_DECLS=0 if your system's include files do not declare
+# functions like 'link' or variables like 'tzname' required by POSIX
+# -DHAVE_STDINT_H=1 if you have a pre-C99 compiler with "stdint.h"
+# -DHAVE_STRFTIME_L=1 if <time.h> declares locale_t and strftime_l
+# This defaults to 0 if _POSIX_VERSION < 200809, 1 otherwise.
+# -DHAVE_STRDUP=0 if your system lacks the strdup function
+# -DHAVE_SYMLINK=0 if your system lacks the symlink function
+# -DHAVE_SYS_STAT_H=0 if your compiler lacks a "sys/stat.h"
+# -DHAVE_SYS_WAIT_H=0 if your compiler lacks a "sys/wait.h"
+# -DHAVE_TZSET=0 if your system lacks a tzset function
+# -DHAVE_UNISTD_H=0 if your compiler lacks a "unistd.h" (Microsoft C++ 7?)
+# -DEPOCH_LOCAL=1 if the 'time' function returns local time not UT
+# -DEPOCH_OFFSET=N if the 'time' function returns a value N greater
+# than what POSIX specifies, assuming local time is UT.
+# For example, N is 252460800 on AmigaOS.
+# -DNO_RUN_TIME_WARNINGS_ABOUT_YEAR_2000_PROBLEMS_THANK_YOU=1
+# if you do not want run time warnings about formats that may cause
+# year 2000 grief
+# -Dssize_t=long on ancient hosts that lack ssize_t
+# -DTHREAD_SAFE=1 to make localtime.c thread-safe, as POSIX requires;
+# not needed by the main-program tz code, which is single-threaded.
+# Append other compiler flags as needed, e.g., -pthread on GNU/Linux.
+# -Dtime_tz=\"T\" to use T as the time_t type, rather than the system time_t
+# -DTZ_DOMAIN=\"foo\" to use "foo" for gettext domain name; default is "tz"
+# -DTZ_DOMAINDIR=\"/path\" to use "/path" for gettext directory;
+# the default is system-supplied, typically "/usr/lib/locale"
+# -DTZDEFRULESTRING=\",date/time,date/time\" to default to the specified
+# DST transitions if the time zone files cannot be accessed
+# -DUNINIT_TRAP=1 if reading uninitialized storage can cause problems
+# other than simply getting garbage data
+# -DUSE_LTZ=0 to build zdump with the system time zone library
+# Also set TZDOBJS=zdump.o and CHECK_TIME_T_ALTERNATIVES= below.
+# -DZIC_MAX_ABBR_LEN_WO_WARN=3
+# (or some other number) to set the maximum time zone abbreviation length
+# that zic will accept without a warning (the default is 6)
+# $(GCC_DEBUG_FLAGS) if you are using recent GCC and want lots of checking
+GCC_DEBUG_FLAGS = -Dlint -g3 -O3 -fno-common -fstrict-aliasing \
+ -Wall -Wextra \
+ -Wbad-function-cast -Wcast-align -Wdate-time \
+ -Wdeclaration-after-statement \
+ -Wdouble-promotion \
+ -Wformat=2 -Winit-self -Wjump-misses-init \
+ -Wlogical-op -Wmissing-prototypes -Wnested-externs \
+ -Wold-style-definition -Woverlength-strings -Wpointer-arith \
+ -Wshadow -Wstrict-prototypes -Wsuggest-attribute=const \
+ -Wsuggest-attribute=format -Wsuggest-attribute=noreturn \
+ -Wsuggest-attribute=pure -Wtrampolines \
+ -Wunused -Wwrite-strings \
+ -Wno-address -Wno-format-nonliteral -Wno-sign-compare \
+ -Wno-type-limits -Wno-unused-parameter
+#
+# If you want to use System V compatibility code, add
+# -DUSG_COMPAT
+# to the end of the "CFLAGS=" line. This arrange for "timezone" and "daylight"
+# variables to be kept up-to-date by the time conversion functions. Neither
+# "timezone" nor "daylight" is described in X3J11's work.
+#
+# If your system has a "GMT offset" field in its "struct tm"s
+# (or if you decide to add such a field in your system's "time.h" file),
+# add the name to a define such as
+# -DTM_GMTOFF=tm_gmtoff
+# to the end of the "CFLAGS=" line. If not defined, the code attempts to
+# guess TM_GMTOFF from other macros; define NO_TM_GMTOFF to suppress this.
+# Similarly, if your system has a "zone abbreviation" field, define
+# -DTM_ZONE=tm_zone
+# and define NO_TM_ZONE to suppress any guessing. These two fields are not
+# required by POSIX, but are widely available on GNU/Linux and BSD systems.
+#
+# If you want functions that were inspired by early versions of X3J11's work,
+# add
+# -DSTD_INSPIRED
+# to the end of the "CFLAGS=" line. This arranges for the functions
+# "tzsetwall", "offtime", "timelocal", "timegm", "timeoff",
+# "posix2time", and "time2posix" to be added to the time conversion library.
+# "tzsetwall" is like "tzset" except that it arranges for local wall clock
+# time (rather than the time specified in the TZ environment variable)
+# to be used.
+# "offtime" is like "gmtime" except that it accepts a second (long) argument
+# that gives an offset to add to the time_t when converting it.
+# "timelocal" is equivalent to "mktime".
+# "timegm" is like "timelocal" except that it turns a struct tm into
+# a time_t using UT (rather than local time as "timelocal" does).
+# "timeoff" is like "timegm" except that it accepts a second (long) argument
+# that gives an offset to use when converting to a time_t.
+# "posix2time" and "time2posix" are described in an included manual page.
+# X3J11's work does not describe any of these functions.
+# Sun has provided "tzsetwall", "timelocal", and "timegm" in SunOS 4.0.
+# These functions may well disappear in future releases of the time
+# conversion package.
+#
+# If you don't want functions that were inspired by NetBSD, add
+# -DNETBSD_INSPIRED=0
+# to the end of the "CFLAGS=" line. Otherwise, the functions
+# "localtime_rz", "mktime_z", "tzalloc", and "tzfree" are added to the
+# time library, and if STD_INSPIRED is also defined the functions
+# "posix2time_z" and "time2posix_z" are added as well.
+# The functions ending in "_z" (or "_rz") are like their unsuffixed
+# (or suffixed-by-"_r") counterparts, except with an extra first
+# argument of opaque type timezone_t that specifies the time zone.
+# "tzalloc" allocates a timezone_t value, and "tzfree" frees it.
+#
+# If you want to allocate state structures in localtime, add
+# -DALL_STATE
+# to the end of the "CFLAGS=" line. Storage is obtained by calling malloc.
+#
+# If you want an "altzone" variable (a la System V Release 3.1), add
+# -DALTZONE
+# to the end of the "CFLAGS=" line.
+# This variable is not described in X3J11's work.
+#
+# NIST-PCTS:151-2, Version 1.4, (1993-12-03) is a test suite put
+# out by the National Institute of Standards and Technology
+# which claims to test C and Posix conformance. If you want to pass PCTS, add
+# -DPCTS
+# to the end of the "CFLAGS=" line.
+#
+# If you want strict compliance with XPG4 as of 1994-04-09, add
+# -DXPG4_1994_04_09
+# to the end of the "CFLAGS=" line. This causes "strftime" to always return
+# 53 as a week number (rather than 52 or 53) for those days in January that
+# before the first Monday in January when a "%V" format is used and January 1
+# falls on a Friday, Saturday, or Sunday.
+
+CFLAGS=
+
+# Linker flags. Default to $(LFLAGS) for backwards compatibility
+# to release 2012h and earlier.
+
+LDFLAGS= $(LFLAGS)
+
+# For leap seconds, this Makefile uses LEAPSECONDS='-L leapseconds' in
+# submake command lines. The default is no leap seconds.
+
+LEAPSECONDS=
+
+# The zic command and its arguments.
+
+zic= ./zic
+ZIC= $(zic) $(ZFLAGS)
+
+ZFLAGS=
+
+# How to use zic to install tz binary files.
+
+ZIC_INSTALL= $(ZIC) -y $(YEARISTYPE) -d $(DESTDIR)$(TZDIR) $(LEAPSECONDS)
+
+# The name of a Posix-compliant 'awk' on your system.
+AWK= awk
+
+# The full path name of a Posix-compliant shell, preferably one that supports
+# the Korn shell's 'select' statement as an extension.
+# These days, Bash is the most popular.
+# It should be OK to set this to /bin/sh, on platforms where /bin/sh
+# lacks 'select' or doesn't completely conform to Posix, but /bin/bash
+# is typically nicer if it works.
+KSHELL= /bin/bash
+
+# The path where SGML DTDs are kept and the catalog file(s) to use when
+# validating. The default should work on both Debian and Red Hat.
+SGML_TOPDIR= /usr
+SGML_DTDDIR= $(SGML_TOPDIR)/share/xml/w3c-sgml-lib/schema/dtd
+SGML_SEARCH_PATH= $(SGML_DTDDIR)/REC-html401-19991224
+SGML_CATALOG_FILES= \
+ $(SGML_TOPDIR)/share/doc/w3-recs/html/www.w3.org/TR/1999/REC-html401-19991224/HTML4.cat:$(SGML_TOPDIR)/share/sgml/html/4.01/HTML4.cat
+
+# The name, arguments and environment of a program to validate your web pages.
+# See <http://openjade.sourceforge.net/doc/> for a validator, and
+# <https://validator.w3.org/source/> for a validation library.
+VALIDATE = nsgmls
+VALIDATE_FLAGS = -s -B -wall -wno-unused-param
+VALIDATE_ENV = \
+ SGML_CATALOG_FILES=$(SGML_CATALOG_FILES) \
+ SGML_SEARCH_PATH=$(SGML_SEARCH_PATH) \
+ SP_CHARSET_FIXED=YES \
+ SP_ENCODING=UTF-8
+
+# This expensive test requires USE_LTZ.
+# To suppress it, define this macro to be empty.
+CHECK_TIME_T_ALTERNATIVES = check_time_t_alternatives
+
+# SAFE_CHAR is a regular expression that matches a safe character.
+# Some parts of this distribution are limited to safe characters;
+# others can use any UTF-8 character.
+# For now, the safe characters are a safe subset of ASCII.
+# The caller must set the shell variable 'sharp' to the character '#',
+# since Makefile macros cannot contain '#'.
+# TAB_CHAR is a single tab character, in single quotes.
+TAB_CHAR= ' '
+SAFE_CHARSET1= $(TAB_CHAR)' !\"'$$sharp'$$%&'\''()*+,./0123456789:;<=>?@'
+SAFE_CHARSET2= 'ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\^_`'
+SAFE_CHARSET3= 'abcdefghijklmnopqrstuvwxyz{|}~'
+SAFE_CHARSET= $(SAFE_CHARSET1)$(SAFE_CHARSET2)$(SAFE_CHARSET3)
+SAFE_CHAR= '[]'$(SAFE_CHARSET)'-]'
+
+# OK_CHAR matches any character allowed in the distributed files.
+# This is the same as SAFE_CHAR, except that multibyte letters are
+# also allowed so that commentary can contain people's names and quote
+# non-English sources. For non-letters the sources are limited to
+# ASCII renderings for the convenience of maintainers whose text editors
+# mishandle UTF-8 by default (e.g., XEmacs 21.4.22).
+OK_CHAR= '[][:alpha:]'$(SAFE_CHARSET)'-]'
+
+# SAFE_LINE matches a line of safe characters.
+# SAFE_SHARP_LINE is similar, except any OK character can follow '#';
+# this is so that comments can contain non-ASCII characters.
+# OK_LINE matches a line of OK characters.
+SAFE_LINE= '^'$(SAFE_CHAR)'*$$'
+SAFE_SHARP_LINE='^'$(SAFE_CHAR)'*('$$sharp$(OK_CHAR)'*)?$$'
+OK_LINE= '^'$(OK_CHAR)'*$$'
+
+# Flags to give 'tar' when making a distribution.
+# Try to use flags appropriate for GNU tar.
+GNUTARFLAGS= --numeric-owner --owner=0 --group=0 --mode=go+u,go-w --sort=name
+TARFLAGS= `if tar $(GNUTARFLAGS) --version >/dev/null 2>&1; \
+ then echo $(GNUTARFLAGS); \
+ else :; \
+ fi`
+
+# Flags to give 'gzip' when making a distribution.
+GZIPFLAGS= -9n
+
+###############################################################################
+
+#MAKE= make
+
+cc= cc
+CC= $(cc) -DTZDIR=\"$(TZDIR)\"
+
+AR= ar
+
+# ':' on typical hosts; 'ranlib' on the ancient hosts that still need ranlib.
+RANLIB= :
+
+TZCOBJS= zic.o
+TZDOBJS= zdump.o localtime.o asctime.o
+DATEOBJS= date.o localtime.o strftime.o asctime.o
+LIBSRCS= localtime.c asctime.c difftime.c
+LIBOBJS= localtime.o asctime.o difftime.o
+HEADERS= tzfile.h private.h
+NONLIBSRCS= zic.c zdump.c
+NEWUCBSRCS= date.c strftime.c
+SOURCES= $(HEADERS) $(LIBSRCS) $(NONLIBSRCS) $(NEWUCBSRCS) \
+ tzselect.ksh workman.sh
+MANS= newctime.3 newstrftime.3 newtzset.3 time2posix.3 \
+ tzfile.5 tzselect.8 zic.8 zdump.8
+MANTXTS= newctime.3.txt newstrftime.3.txt newtzset.3.txt \
+ time2posix.3.txt \
+ tzfile.5.txt tzselect.8.txt zic.8.txt zdump.8.txt \
+ date.1.txt
+COMMON= CONTRIBUTING LICENSE Makefile NEWS README Theory version
+WEB_PAGES= tz-art.htm tz-how-to.html tz-link.htm
+DOCS= $(MANS) date.1 $(MANTXTS) $(WEB_PAGES)
+PRIMARY_YDATA= africa antarctica asia australasia \
+ europe northamerica southamerica
+YDATA= $(PRIMARY_YDATA) pacificnew etcetera backward
+NDATA= systemv factory
+TDATA= $(YDATA) $(NDATA)
+ZONETABLES= zone1970.tab zone.tab
+TABDATA= iso3166.tab leapseconds $(ZONETABLES)
+LEAP_DEPS= leapseconds.awk leap-seconds.list
+DATA= $(YDATA) $(NDATA) backzone $(TABDATA) \
+ leap-seconds.list yearistype.sh
+AWK_SCRIPTS= checklinks.awk checktab.awk leapseconds.awk
+MISC= $(AWK_SCRIPTS) zoneinfo2tdf.pl
+TZS_YEAR= 2050
+TZS= to$(TZS_YEAR).tzs
+TZS_NEW= to$(TZS_YEAR)new.tzs
+TZS_DEPS= $(PRIMARY_YDATA) asctime.c localtime.c \
+ private.h tzfile.h zdump.c zic.c
+ENCHILADA= $(COMMON) $(DOCS) $(SOURCES) $(DATA) $(MISC) $(TZS)
+
+# Consult these files when deciding whether to rebuild the 'version' file.
+# This list is not the same as the output of 'git ls-files', since
+# .gitignore is not distributed.
+VERSION_DEPS= \
+ CONTRIBUTING LICENSE Makefile NEWS README Theory \
+ africa antarctica asctime.c asia australasia \
+ backward backzone \
+ checklinks.awk checktab.awk \
+ date.1 date.c difftime.c \
+ etcetera europe factory iso3166.tab \
+ leap-seconds.list leapseconds.awk localtime.c \
+ newctime.3 newstrftime.3 newtzset.3 northamerica \
+ pacificnew private.h \
+ southamerica strftime.c systemv \
+ time2posix.3 tz-art.htm tz-how-to.html tz-link.htm \
+ tzfile.5 tzfile.h tzselect.8 tzselect.ksh \
+ workman.sh yearistype.sh \
+ zdump.8 zdump.c zic.8 zic.c \
+ zone.tab zone1970.tab zoneinfo2tdf.pl
+
+# And for the benefit of csh users on systems that assume the user
+# shell should be used to handle commands in Makefiles. . .
+
+SHELL= /bin/sh
+
+all: tzselect yearistype zic zdump libtz.a $(TABDATA)
+
+ALL: all date $(ENCHILADA)
+
+install: all $(DATA) $(REDO) $(MANS)
+ mkdir -p $(DESTDIR)$(ETCDIR) $(DESTDIR)$(TZDIR) \
+ $(DESTDIR)$(LIBDIR) \
+ $(DESTDIR)$(MANDIR)/man3 $(DESTDIR)$(MANDIR)/man5 \
+ $(DESTDIR)$(MANDIR)/man8
+ $(ZIC_INSTALL) -l $(LOCALTIME) -p $(POSIXRULES)
+ cp -f iso3166.tab $(ZONETABLES) $(DESTDIR)$(TZDIR)/.
+ cp tzselect zic zdump $(DESTDIR)$(ETCDIR)/.
+ cp libtz.a $(DESTDIR)$(LIBDIR)/.
+ $(RANLIB) $(DESTDIR)$(LIBDIR)/libtz.a
+ cp -f newctime.3 newtzset.3 $(DESTDIR)$(MANDIR)/man3/.
+ cp -f tzfile.5 $(DESTDIR)$(MANDIR)/man5/.
+ cp -f tzselect.8 zdump.8 zic.8 $(DESTDIR)$(MANDIR)/man8/.
+
+INSTALL: ALL install date.1
+ mkdir -p $(DESTDIR)$(BINDIR) $(DESTDIR)$(MANDIR)/man1
+ cp date $(DESTDIR)$(BINDIR)/.
+ cp -f date.1 $(DESTDIR)$(MANDIR)/man1/.
+
+version: $(VERSION_DEPS)
+ { (type git) >/dev/null 2>&1 && \
+ V=`git describe --match '[0-9][0-9][0-9][0-9][a-z]*' \
+ --abbrev=7 --dirty` || \
+ V=$(VERSION); } && \
+ printf '%s\n' "$$V" >$@.out
+ mv $@.out $@
+
+version.h: version
+ VERSION=`cat version` && printf '%s\n' \
+ 'static char const PKGVERSION[]="($(PACKAGE)) ";' \
+ "static char const TZVERSION[]=\"$$VERSION\";" \
+ 'static char const REPORT_BUGS_TO[]="$(BUGEMAIL)";' \
+ >$@.out
+ mv $@.out $@
+
+zdump: $(TZDOBJS)
+ $(CC) -o $@ $(CFLAGS) $(LDFLAGS) $(TZDOBJS) $(LDLIBS)
+
+zic: $(TZCOBJS)
+ $(CC) -o $@ $(CFLAGS) $(LDFLAGS) $(TZCOBJS) $(LDLIBS)
+
+yearistype: yearistype.sh
+ cp yearistype.sh yearistype
+ chmod +x yearistype
+
+leapseconds: $(LEAP_DEPS)
+ $(AWK) -f leapseconds.awk leap-seconds.list >$@.out
+ mv $@.out $@
+
+# Arguments to pass to submakes of install_data.
+# They can be overridden by later submake arguments.
+INSTALLARGS = \
+ DESTDIR=$(DESTDIR) \
+ LEAPSECONDS='$(LEAPSECONDS)' \
+ PACKRATDATA='$(PACKRATDATA)' \
+ TZDIR=$(TZDIR) \
+ YEARISTYPE=$(YEARISTYPE) \
+ ZIC='$(ZIC)'
+
+# 'make install_data' installs one set of tz binary files.
+# It can be tailored by setting LEAPSECONDS, PACKRATDATA, etc.
+install_data: zic leapseconds yearistype $(PACKRATDATA) $(TDATA)
+ $(ZIC_INSTALL) $(TDATA)
+ $(AWK) '/^Rule/' $(TDATA) | $(ZIC_INSTALL) - $(PACKRATDATA)
+
+posix_only:
+ $(MAKE) $(INSTALLARGS) LEAPSECONDS= install_data
+
+right_only:
+ $(MAKE) $(INSTALLARGS) LEAPSECONDS='-L leapseconds' \
+ install_data
+
+# In earlier versions of this makefile, the other two directories were
+# subdirectories of $(TZDIR). However, this led to configuration errors.
+# For example, with posix_right under the earlier scheme,
+# TZ='right/Australia/Adelaide' got you localtime with leap seconds,
+# but gmtime without leap seconds, which led to problems with applications
+# like sendmail that subtract gmtime from localtime.
+# Therefore, the other two directories are now siblings of $(TZDIR).
+# You must replace all of $(TZDIR) to switch from not using leap seconds
+# to using them, or vice versa.
+right_posix: right_only
+ rm -fr $(DESTDIR)$(TZDIR)-leaps
+ ln -s $(TZDIR_BASENAME) $(DESTDIR)$(TZDIR)-leaps || \
+ $(MAKE) $(INSTALLARGS) TZDIR=$(TZDIR)-leaps right_only
+ $(MAKE) $(INSTALLARGS) TZDIR=$(TZDIR)-posix posix_only
+
+posix_right: posix_only
+ rm -fr $(DESTDIR)$(TZDIR)-posix
+ ln -s $(TZDIR_BASENAME) $(DESTDIR)$(TZDIR)-posix || \
+ $(MAKE) $(INSTALLARGS) TZDIR=$(TZDIR)-posix posix_only
+ $(MAKE) $(INSTALLARGS) TZDIR=$(TZDIR)-leaps right_only
+
+# This obsolescent rule is present for backwards compatibility with
+# tz releases 2014g through 2015g. It should go away eventually.
+posix_packrat:
+ $(MAKE) $(INSTALLARGS) PACKRATDATA=backzone posix_only
+
+zones: $(REDO)
+
+$(TZS_NEW): $(TDATA) zdump zic
+ mkdir -p tzs.dir
+ $(zic) -d tzs.dir $(TDATA)
+ $(AWK) '/^Link/{print $$1 "\t" $$2 "\t" $$3}' \
+ $(TDATA) | LC_ALL=C sort >$@.out
+ wd=`pwd` && \
+ zones=`$(AWK) -v wd="$$wd" \
+ '/^Zone/{print wd "/tzs.dir/" $$2}' $(TDATA) \
+ | LC_ALL=C sort` && \
+ ./zdump -i -c $(TZS_YEAR) $$zones >>$@.out
+ sed 's,^TZ=".*tzs\.dir/,TZ=",' $@.out >$@.sed.out
+ rm -fr tzs.dir $@.out
+ mv $@.sed.out $@
+
+# If $(TZS) does not already exist (e.g., old-format tarballs), create it.
+# If it exists but 'make check_tzs' fails, a maintainer should inspect the
+# failed output and fix the inconsistency, perhaps by running 'make force_tzs'.
+$(TZS):
+ $(MAKE) force_tzs
+
+force_tzs: $(TZS_NEW)
+ cp $(TZS_NEW) $(TZS)
+
+libtz.a: $(LIBOBJS)
+ $(AR) ru $@ $(LIBOBJS)
+ $(RANLIB) $@
+
+date: $(DATEOBJS)
+ $(CC) -o $@ $(CFLAGS) $(LDFLAGS) $(DATEOBJS) $(LDLIBS)
+
+tzselect: tzselect.ksh version
+ VERSION=`cat version` && sed \
+ -e 's|#!/bin/bash|#!$(KSHELL)|g' \
+ -e 's|AWK=[^}]*|AWK=$(AWK)|g' \
+ -e 's|\(PKGVERSION\)=.*|\1='\''($(PACKAGE)) '\''|' \
+ -e 's|\(REPORT_BUGS_TO\)=.*|\1=$(BUGEMAIL)|' \
+ -e 's|TZDIR=[^}]*|TZDIR=$(TZDIR)|' \
+ -e 's|\(TZVERSION\)=.*|\1='"$$VERSION"'|' \
+ <$@.ksh >$@.out
+ chmod +x $@.out
+ mv $@.out $@
+
+check: check_character_set check_white_space check_links check_sorted \
+ check_tables check_tzs check_web
+
+check_character_set: $(ENCHILADA)
+ LC_ALL=en_US.utf8 && export LC_ALL && \
+ sharp='#' && \
+ ! grep -Env $(SAFE_LINE) $(MANS) date.1 $(MANTXTS) \
+ $(MISC) $(SOURCES) $(WEB_PAGES) \
+ CONTRIBUTING LICENSE Makefile README version && \
+ ! grep -Env $(SAFE_SHARP_LINE) $(TDATA) backzone \
+ leapseconds yearistype.sh zone.tab && \
+ ! grep -Env $(OK_LINE) $(ENCHILADA)
+
+check_white_space: $(ENCHILADA)
+ patfmt=' \t|[\f\r\v]' && pat=`printf "$$patfmt\\n"` && \
+ ! grep -En "$$pat" $(ENCHILADA)
+ ! grep -n '[[:space:]]$$' $(ENCHILADA)
+
+CHECK_CC_LIST = { n = split($$1,a,/,/); for (i=2; i<=n; i++) print a[1], a[i]; }
+
+check_sorted: backward backzone iso3166.tab zone.tab zone1970.tab
+ $(AWK) '/^Link/ {print $$3}' backward | LC_ALL=C sort -cu
+ $(AWK) '/^Zone/ {print $$2}' backzone | LC_ALL=C sort -cu
+ $(AWK) '/^[^#]/ {print $$1}' iso3166.tab | LC_ALL=C sort -cu
+ $(AWK) '/^[^#]/ {print $$1}' zone.tab | LC_ALL=C sort -c
+ $(AWK) '/^[^#]/ {print substr($$0, 1, 2)}' zone1970.tab | \
+ LC_ALL=C sort -c
+ $(AWK) '/^[^#]/ $(CHECK_CC_LIST)' zone1970.tab | \
+ LC_ALL=C sort -cu
+
+check_links: checklinks.awk $(TDATA)
+ $(AWK) -f checklinks.awk $(TDATA)
+
+check_tables: checktab.awk $(PRIMARY_YDATA) $(ZONETABLES)
+ for tab in $(ZONETABLES); do \
+ $(AWK) -f checktab.awk -v zone_table=$$tab $(PRIMARY_YDATA) \
+ || exit; \
+ done
+
+check_tzs: $(TZS) $(TZS_NEW)
+ diff -u $(TZS) $(TZS_NEW)
+
+check_web: $(WEB_PAGES)
+ $(VALIDATE_ENV) $(VALIDATE) $(VALIDATE_FLAGS) $(WEB_PAGES)
+
+clean_misc:
+ rm -f core *.o *.out \
+ date tzselect version.h zdump zic yearistype libtz.a
+clean: clean_misc
+ rm -fr *.dir tzdb-*/ $(TZS_NEW)
+
+maintainer-clean: clean
+ @echo 'This command is intended for maintainers to use; it'
+ @echo 'deletes files that may need special tools to rebuild.'
+ rm -f leapseconds version $(MANTXTS) $(TZS) *.asc *.tar.*
+
+names:
+ @echo $(ENCHILADA)
+
+public: check check_public $(CHECK_TIME_T_ALTERNATIVES) \
+ tarballs signatures
+
+date.1.txt: date.1
+newctime.3.txt: newctime.3
+newstrftime.3.txt: newstrftime.3
+newtzset.3.txt: newtzset.3
+time2posix.3.txt: time2posix.3
+tzfile.5.txt: tzfile.5
+tzselect.8.txt: tzselect.8
+zdump.8.txt: zdump.8
+zic.8.txt: zic.8
+
+$(MANTXTS): workman.sh
+ LC_ALL=C sh workman.sh `expr $@ : '\(.*\)\.txt$$'` >$@.out
+ mv $@.out $@
+
+# Set the time stamps to those of the git repository, if available,
+# and if the files have not changed since then.
+# This uses GNU 'touch' syntax 'touch -d@N FILE',
+# where N is the number of seconds since 1970.
+# If git or GNU 'touch' is absent, don't bother to sync with git timestamps.
+# Also, set the timestamp of each prebuilt file like 'leapseconds'
+# to be the maximum of the files it depends on.
+set-timestamps.out: $(ENCHILADA)
+ rm -f $@
+ if (type git) >/dev/null 2>&1 && \
+ files=`git ls-files $(ENCHILADA)` && \
+ touch -md @1 test.out; then \
+ rm -f test.out && \
+ for file in $$files; do \
+ if git diff --quiet $$file; then \
+ time=`git log -1 --format='tformat:%ct' $$file` && \
+ touch -cmd @$$time $$file; \
+ else \
+ echo >&2 "$$file: warning: does not match repository"; \
+ fi || exit; \
+ done; \
+ fi
+ touch -cmr `ls -t $(LEAP_DEPS) | sed 1q` leapseconds
+ for file in `ls $(MANTXTS) | sed 's/\.txt$$//'`; do \
+ touch -cmr `ls -t $$file workman.sh | sed 1q` $$file.txt || \
+ exit; \
+ done
+ touch -cmr `ls -t $(TZS_DEPS) | sed 1q` $(TZS)
+ touch -cmr `ls -t $(VERSION_DEPS) | sed 1q` version
+ touch $@
+
+# The zics below ensure that each data file can stand on its own.
+# We also do an all-files run to catch links to links.
+
+check_public:
+ $(MAKE) maintainer-clean
+ $(MAKE) "CFLAGS=$(GCC_DEBUG_FLAGS)" ALL
+ mkdir -p public.dir
+ for i in $(TDATA) ; do \
+ $(zic) -v -d public.dir $$i 2>&1 || exit; \
+ done
+ $(zic) -v -d public.dir $(TDATA)
+ rm -fr public.dir
+
+# Check that the code works under various alternative
+# implementations of time_t.
+check_time_t_alternatives:
+ if diff -q Makefile Makefile 2>/dev/null; then \
+ quiet_option='-q'; \
+ else \
+ quiet_option=''; \
+ fi && \
+ wd=`pwd` && \
+ zones=`$(AWK) '/^[^#]/ { print $$3 }' <zone1970.tab` && \
+ for type in $(TIME_T_ALTERNATIVES); do \
+ mkdir -p time_t.dir/$$type && \
+ $(MAKE) clean_misc && \
+ $(MAKE) TOPDIR="$$wd/time_t.dir/$$type" \
+ CFLAGS='$(CFLAGS) -Dtime_tz='"'$$type'" \
+ REDO='$(REDO)' \
+ install && \
+ diff $$quiet_option -r \
+ time_t.dir/int64_t/etc/zoneinfo \
+ time_t.dir/$$type/etc/zoneinfo && \
+ case $$type in \
+ int32_t) range=-2147483648,2147483647;; \
+ uint32_t) range=0,4294967296;; \
+ int64_t) continue;; \
+ *u*) range=0,10000000000;; \
+ *) range=-10000000000,10000000000;; \
+ esac && \
+ echo checking $$type zones ... && \
+ time_t.dir/int64_t/etc/zdump -V -t $$range $$zones \
+ >time_t.dir/int64_t.out && \
+ time_t.dir/$$type/etc/zdump -V -t $$range $$zones \
+ >time_t.dir/$$type.out && \
+ diff -u time_t.dir/int64_t.out time_t.dir/$$type.out \
+ || exit; \
+ done
+ rm -fr time_t.dir
+
+tarballs traditional_tarballs signatures traditional_signatures: version
+ VERSION=`cat version` && \
+ $(MAKE) VERSION="$$VERSION" $@_version
+
+tarballs_version: traditional_tarballs_version tzdb-$(VERSION).tar.lz
+traditional_tarballs_version: \
+ tzcode$(VERSION).tar.gz tzdata$(VERSION).tar.gz
+signatures_version: traditional_signatures_version tzdb-$(VERSION).tar.lz.asc
+traditional_signatures_version: \
+ tzcode$(VERSION).tar.gz.asc tzdata$(VERSION).tar.gz.asc \
+
+tzcode$(VERSION).tar.gz: set-timestamps.out
+ LC_ALL=C && export LC_ALL && \
+ tar $(TARFLAGS) -cf - \
+ $(COMMON) $(DOCS) $(SOURCES) | \
+ gzip $(GZIPFLAGS) >$@.out
+ mv $@.out $@
+
+tzdata$(VERSION).tar.gz: set-timestamps.out
+ LC_ALL=C && export LC_ALL && \
+ tar $(TARFLAGS) -cf - $(COMMON) $(DATA) $(MISC) | \
+ gzip $(GZIPFLAGS) >$@.out
+ mv $@.out $@
+
+tzdb-$(VERSION).tar.lz: set-timestamps.out
+ rm -fr tzdb-$(VERSION)
+ mkdir tzdb-$(VERSION)
+ ln $(ENCHILADA) tzdb-$(VERSION)
+ touch -cmr `ls -t tzdb-$(VERSION)/* | sed 1q` tzdb-$(VERSION)
+ LC_ALL=C && export LC_ALL && \
+ tar $(TARFLAGS) -cf - tzdb-$(VERSION) | lzip -9 >$@.out
+ mv $@.out $@
+
+tzcode$(VERSION).tar.gz.asc: tzcode$(VERSION).tar.gz
+ gpg --armor --detach-sign $?
+
+tzdata$(VERSION).tar.gz.asc: tzdata$(VERSION).tar.gz
+ gpg --armor --detach-sign $?
+
+tzdb-$(VERSION).tar.lz.asc: tzdb-$(VERSION).tar.lz
+ gpg --armor --detach-sign $?
+
+typecheck:
+ $(MAKE) clean
+ for i in "long long" unsigned; \
+ do \
+ $(MAKE) CFLAGS="-DTYPECHECK -D__time_t_defined -D_TIME_T \"-Dtime_t=$$i\"" ; \
+ ./zdump -v Europe/Rome ; \
+ $(MAKE) clean ; \
+ done
+
+zonenames: $(TDATA)
+ @$(AWK) '/^Zone/ { print $$2 } /^Link/ { print $$3 }' $(TDATA)
+
+asctime.o: private.h tzfile.h
+date.o: private.h
+difftime.o: private.h
+localtime.o: private.h tzfile.h
+strftime.o: private.h tzfile.h
+zdump.o: version.h
+zic.o: private.h tzfile.h version.h
+
+.KEEP_STATE:
+
+.PHONY: ALL INSTALL all
+.PHONY: check check_character_set check_links
+.PHONY: check_public check_sorted check_tables
+.PHONY: check_time_t_alternatives check_tzs check_web check_white_space
+.PHONY: clean clean_misc force_tzs
+.PHONY: install install_data maintainer-clean names
+.PHONY: posix_only posix_packrat posix_right
+.PHONY: public right_only right_posix signatures signatures_version
+.PHONY: tarballs tarballs_version typecheck
+.PHONY: zonenames zones
diff --git a/NEWS b/NEWS
new file mode 100644
index 000000000000..da5c2a5717cf
--- /dev/null
+++ b/NEWS
@@ -0,0 +1,3782 @@
+News for the tz database
+
+Release 2016i - 2016-11-01 23:19:52 -0700
+
+ Briefly: Cyprus split into two time zones on 2016-10-30, and Tonga
+ reintroduces DST on 2016-11-06.
+
+ Changes to future time stamps
+
+ Pacific/Tongatapu begins DST on 2016-11-06 at 02:00, ending on
+ 2017-01-15 at 03:00. Assume future observances in Tonga will be
+ from the first Sunday in November through the third Sunday in
+ January, like Fiji. (Thanks to Pulu ʻAnau.) Switch to numeric
+ time zone abbreviations for this zone.
+
+ Changes to past and future time stamps
+
+ Northern Cyprus is now +03 year round, causing a split in Cyprus
+ time zones starting 2016-10-30 at 04:00. This creates a zone
+ Asia/Famagusta. (Thanks to Even Scharning and Matt Johnson.)
+
+ Antarctica/Casey switched from +08 to +11 on 2016-10-22.
+ (Thanks to Steffen Thorsen.)
+
+ Changes to past time stamps
+
+ Several corrections were made for pre-1975 time stamps in Italy.
+ These affect Europe/Malta, Europe/Rome, Europe/San_Marino, and
+ Europe/Vatican.
+
+ First, the 1893-11-01 00:00 transition in Italy used the new UT
+ offset (+01), not the old (+00:49:56). (Thanks to Michael
+ Deckers.)
+
+ Second, rules for daylight saving in Italy were changed to agree
+ with Italy's National Institute of Metrological Research (INRiM)
+ except for 1944, as follows (thanks to Pierpaolo Bernardi, Brian
+ Inglis, and Michael Deckers):
+
+ The 1916-06-03 transition was at 24:00, not 00:00.
+
+ The 1916-10-01, 1919-10-05, and 1920-09-19 transitions were at
+ 00:00, not 01:00.
+
+ The 1917-09-30 and 1918-10-06 transitions were at 24:00, not
+ 01:00.
+
+ The 1944-09-17 transition was at 03:00, not 01:00. This
+ particular change is taken from Italian law as INRiM's table,
+ (which says 02:00) appears to have a typo here. Also, keep the
+ 1944-04-03 transition for Europe/Rome, as Rome was controlled by
+ Germany then.
+
+ The 1967-1970 and 1972-1974 fallback transitions were at 01:00,
+ not 00:00.
+
+ Changes to code
+
+ The code should now be buildable on AmigaOS merely by setting the
+ appropriate Makefile variables. (From a patch by Carsten Larsen.)
+
+
+Release 2016h - 2016-10-19 23:17:57 -0700
+
+ Changes to future time stamps
+
+ Asia/Gaza and Asia/Hebron end DST on 2016-10-29 at 01:00, not
+ 2016-10-21 at 00:00. (Thanks to Sharef Mustafa.) Predict that
+ future fall transitions will be on the last Saturday of October
+ at 01:00, which is consistent with predicted spring transitions
+ on the last Saturday of March. (Thanks to Tim Parenti.)
+
+ Changes to past time stamps
+
+ In Turkey, transitions in 1986-1990 were at 01:00 standard time
+ not at 02:00, and the spring 1994 transition was on March 20, not
+ March 27. (Thanks to Kıvanç Yazan.)
+
+ Changes to past and future time zone abbreviations
+
+ Asia/Colombo now uses numeric time zone abbreviations like "+0530"
+ instead of alphabetic ones like "IST" and "LKT". Various
+ English-language sources use "IST", "LKT" and "SLST", with no
+ working consensus. (Usage of "SLST" mentioned by Sadika
+ Sumanapala.)
+
+ Changes to code
+
+ zic no longer mishandles relativizing file names when creating
+ symbolic links like /etc/localtime, when these symbolic links
+ are outside the usual directory hierarchy. This fixes a bug
+ introduced in 2016g. (Problem reported by Andreas Stieger.)
+
+ Changes to build procedure
+
+ New rules 'traditional_tarballs' and 'traditional_signatures' for
+ building just the traditional-format distribution. (Requested by
+ Deborah Goldsmith.)
+
+ The file 'version' is now put into the tzdata tarball too.
+ (Requested by Howard Hinnant.)
+
+ Changes to documentation and commentary
+
+ The 'Theory' file now has a section on interface stability.
+ (Requested by Paul Koning.) It also mentions features like
+ tm_zone and localtime_rz that have long been supported by the
+ reference code.
+
+ tz-link.htm has improved coverage of time zone boundaries suitable
+ for geolocation. (Thanks to heads-ups from Evan Siroky and Matt
+ Johnson.)
+
+ The US commentary now mentions Allen and the "day of two noons".
+
+ The Fiji commentary mentions the government's 2016-10-03 press
+ release. (Thanks to Raymond Kumar.)
+
+
+Release 2016g - 2016-09-13 08:56:38 -0700
+
+ Changes to future time stamps
+
+ Turkey switched from EET/EEST (+02/+03) to permanent +03,
+ effective 2016-09-07. (Thanks to Burak AYDIN.) Use "+03" rather
+ than an invented abbreviation for the new time.
+
+ New leap second 2016-12-31 23:59:60 UTC as per IERS Bulletin C 52.
+ (Thanks to Tim Parenti.)
+
+ Changes to past time stamps
+
+ For America/Los_Angeles, spring-forward transition times have been
+ corrected from 02:00 to 02:01 in 1948, and from 02:00 to 01:00 in
+ 1950-1966.
+
+ For zones using Soviet time on 1919-07-01, transitions to UT-based
+ time were at 00:00 UT, not at 02:00 local time. The affected
+ zones are Europe/Kirov, Europe/Moscow, Europe/Samara, and
+ Europe/Ulyanovsk. (Thanks to Alexander Belopolsky.)
+
+ Changes to past and future time zone abbreviations
+
+ The Factory zone now uses the time zone abbreviation -00 instead
+ of a long English-language string, as -00 is now the normal way to
+ represent an undefined time zone.
+
+ Several zones in Antarctica and the former Soviet Union, along
+ with zones intended for ships at sea that cannot use POSIX TZ
+ strings, now use numeric time zone abbreviations instead of
+ invented or obsolete alphanumeric abbreviations. The affected
+ zones are Antarctica/Casey, Antarctica/Davis,
+ Antarctica/DumontDUrville, Antarctica/Mawson, Antarctica/Rothera,
+ Antarctica/Syowa, Antarctica/Troll, Antarctica/Vostok,
+ Asia/Anadyr, Asia/Ashgabat, Asia/Baku, Asia/Bishkek, Asia/Chita,
+ Asia/Dushanbe, Asia/Irkutsk, Asia/Kamchatka, Asia/Khandyga,
+ Asia/Krasnoyarsk, Asia/Magadan, Asia/Omsk, Asia/Sakhalin,
+ Asia/Samarkand, Asia/Srednekolymsk, Asia/Tashkent, Asia/Tbilisi,
+ Asia/Ust-Nera, Asia/Vladivostok, Asia/Yakutsk, Asia/Yekaterinburg,
+ Asia/Yerevan, Etc/GMT-14, Etc/GMT-13, Etc/GMT-12, Etc/GMT-11,
+ Etc/GMT-10, Etc/GMT-9, Etc/GMT-8, Etc/GMT-7, Etc/GMT-6, Etc/GMT-5,
+ Etc/GMT-4, Etc/GMT-3, Etc/GMT-2, Etc/GMT-1, Etc/GMT+1, Etc/GMT+2,
+ Etc/GMT+3, Etc/GMT+4, Etc/GMT+5, Etc/GMT+6, Etc/GMT+7, Etc/GMT+8,
+ Etc/GMT+9, Etc/GMT+10, Etc/GMT+11, Etc/GMT+12, Europe/Kaliningrad,
+ Europe/Minsk, Europe/Samara, Europe/Volgograd, and
+ Indian/Kerguelen. For Europe/Moscow the invented abbreviation MSM
+ was replaced by +05, whereas MSK and MSD were kept as they are not
+ our invention and are widely used.
+
+ Changes to zone names
+
+ Rename Asia/Rangoon to Asia/Yangon, with a backward compatibility link.
+ (Thanks to David Massoud.)
+
+ Changes to code
+
+ zic no longer generates binary files containing POSIX TZ-like
+ strings that disagree with the local time type after the last
+ explicit transition in the data. This fixes a bug with
+ Africa/Casablanca and Africa/El_Aaiun in some year-2037 time
+ stamps on the reference platform. (Thanks to Alexander Belopolsky
+ for reporting the bug and suggesting a way forward.)
+
+ If the installed localtime and/or posixrules files are symbolic
+ links, zic now keeps them symbolic links when updating them, for
+ compatibility with platforms like OpenSUSE where other programs
+ configure these files as symlinks.
+
+ zic now avoids hard linking to symbolic links, avoids some
+ unnecessary mkdir and stat system calls, and uses shorter file
+ names internally.
+
+ zdump has a new -i option to generate transitions in a
+ more-compact but still human-readable format. This option is
+ experimental, and the output format may change in future versions.
+ (Thanks to Jon Skeet for suggesting that an option was needed,
+ and thanks to Tim Parenti and Chris Rovick for further comments.)
+
+ Changes to build procedure
+
+ An experimental distribution format is available, in addition
+ to the traditional format which will continue to be distributed.
+ The new format is a tarball tzdb-VERSION.tar.lz with signature
+ file tzdb-VERSION.tar.lz.asc. It unpacks to a top-level directory
+ tzdb-VERSION containing the code and data of the traditional
+ two-tarball format, along with extra data that may be useful.
+ (Thanks to Antonio Diaz Diaz, Oscar van Vlijmen, and many others
+ for comments about the experimental format.)
+
+ The release version number is now more accurate in the usual case
+ where releases are built from a Git repository. For example, if
+ 23 commits and some working-file changes have been made since
+ release 2016g, the version number is now something like
+ '2016g-23-g50556e3-dirty' instead of the misleading '2016g'.
+ Official releases uses the same version number format as before,
+ e.g., '2016g'. To support the more-accurate version number, its
+ specification has moved from a line in the Makefile to a new
+ source file 'version'.
+
+ The experimental distribution contains a file to2050.tzs that
+ contains what should be the output of 'zdump -i -c 2050' on
+ primary zones. If this file is available, 'make check' now checks
+ that zdump generates this output.
+
+ 'make check_web' now works on Fedora-like distributions.
+
+ Changes to documentation and commentary
+
+ tzfile.5 now documents the new restriction on POSIX TZ-like
+ strings that is now implemented by zic.
+
+ Comments now cite URLs for some 1917-1921 Russian DST decrees.
+ (Thanks to Alexander Belopolsky.)
+
+ tz-link.htm mentions JuliaTime (thanks to Curtis Vogt) and Time4J
+ (thanks to Meno Hochschild) and ThreeTen-Extra, and its
+ description of Java 8 has been brought up to date (thanks to
+ Stephen Colebourne). Its description of local time on Mars has
+ been updated to match current practice, and URLs have been updated
+ and some obsolete ones removed.
+
+
+Release 2016f - 2016-07-05 16:26:51 +0200
+
+ Changes affecting future time stamps
+
+ The Egyptian government changed its mind on short notice, and
+ Africa/Cairo will not introduce DST starting 2016-07-07 after all.
+ (Thanks to Mina Samuel.)
+
+ Asia/Novosibirsk switches from +06 to +07 on 2016-07-24 at 02:00.
+ (Thanks to Stepan Golosunov.)
+
+ Changes to past and future time stamps
+
+ Asia/Novokuznetsk and Asia/Novosibirsk now use numeric time zone
+ abbreviations instead of invented ones.
+
+ Changes affecting past time stamps
+
+ Europe/Minsk's 1992-03-29 spring-forward transition was at 02:00 not 00:00.
+ (Thanks to Stepan Golosunov.)
+
+
+Release 2016e - 2016-06-14 08:46:16 -0700
+
+ Changes affecting future time stamps
+
+ Africa/Cairo observes DST in 2016 from July 7 to the end of October.
+ Guess October 27 and 24:00 transitions. (Thanks to Steffen Thorsen.)
+ For future years, guess April's last Thursday to October's last
+ Thursday except for Ramadan.
+
+ Changes affecting past time stamps
+
+ Locations while uninhabited now use '-00', not 'zzz', as a
+ placeholder time zone abbreviation. This is inspired by Internet
+ RFC 3339 and is more consistent with numeric time zone
+ abbreviations already used elsewhere. The change affects several
+ arctic and antarctic locations, e.g., America/Cambridge_Bay before
+ 1920 and Antarctica/Troll before 2005.
+
+ Asia/Baku's 1992-09-27 transition from +04 (DST) to +04 (non-DST) was
+ at 03:00, not 23:00 the previous day. (Thanks to Michael Deckers.)
+
+ Changes to code
+
+ zic now outputs a dummy transition at time 2**31 - 1 in zones
+ whose POSIX-style TZ strings contain a '<'. This mostly works
+ around Qt bug 53071 <https://bugreports.qt.io/browse/QTBUG-53071>.
+ (Thanks to Zhanibek Adilbekov for reporting the Qt bug.)
+
+ Changes affecting documentation and commentary
+
+ tz-link.htm says why governments should give plenty of notice for
+ time zone or DST changes, and refers to Matt Johnson's blog post.
+
+ tz-link.htm mentions Tzdata for Elixir. (Thanks to Matt Johnson.)
+
+
+Release 2016d - 2016-04-17 22:50:29 -0700
+
+ Changes affecting future time stamps
+
+ America/Caracas switches from -0430 to -04 on 2016-05-01 at 02:30.
+ (Thanks to Alexander Krivenyshev for the heads-up.)
+
+ Asia/Magadan switches from +10 to +11 on 2016-04-24 at 02:00.
+ (Thanks to Alexander Krivenyshev and Matt Johnson.)
+
+ New zone Asia/Tomsk, split off from Asia/Novosibirsk. It covers
+ Tomsk Oblast, Russia, which switches from +06 to +07 on 2016-05-29
+ at 02:00. (Thanks to Stepan Golosunov.)
+
+ Changes affecting past time stamps
+
+ New zone Europe/Kirov, split off from Europe/Volgograd. It covers
+ Kirov Oblast, Russia, which switched from +04/+05 to +03/+04 on
+ 1989-03-26 at 02:00, roughly a year after Europe/Volgograd made
+ the same change. (Thanks to Stepan Golosunov.)
+
+ Russia and nearby locations had daylight-saving transitions on
+ 1992-03-29 at 02:00 and 1992-09-27 at 03:00, instead of on
+ 1992-03-28 at 23:00 and 1992-09-26 at 23:00. (Thanks to Stepan
+ Golosunov.)
+
+ Many corrections to historical time in Kazakhstan from 1991
+ through 2005. (Thanks to Stepan Golosunov.) Replace Kazakhstan's
+ invented time zone abbreviations with numeric abbreviations.
+
+ Changes to commentary
+
+ Mention Internet RFCs 7808 (TZDIST) and 7809 (CalDAV time zone references).
+
+
+Release 2016c - 2016-03-23 00:51:27 -0700
+
+ Changes affecting future time stamps
+
+ Azerbaijan no longer observes DST. (Thanks to Steffen Thorsen.)
+
+ Chile reverts from permanent to seasonal DST. (Thanks to Juan
+ Correa for the heads-up, and to Tim Parenti for corrections.)
+ Guess that future transitions are August's and May's second
+ Saturdays at 24:00 mainland time. Also, call the period from
+ 2014-09-07 through 2016-05-14 daylight saving time instead of
+ standard time, as that seems more appropriate now.
+
+ Changes affecting past time stamps
+
+ Europe/Kaliningrad and Europe/Vilnius changed from +03/+04 to
+ +02/+03 on 1989-03-26, not 1991-03-31. Europe/Volgograd changed
+ from +04/+05 to +03/+04 on 1988-03-27, not 1989-03-26.
+ (Thanks to Stepan Golosunov.)
+
+ Changes to commentary
+
+ Several updates and URLs for historical and proposed Russian changes.
+ (Thanks to Stepan Golosunov, Matt Johnson, and Alexander Krivenyshev.)
+
+
+Release 2016b - 2016-03-12 17:30:14 -0800
+
+ Compatibility note
+
+ Starting with release 2016b, some data entries cause zic implementations
+ derived from tz releases 2005j through 2015e to issue warnings like
+ "time zone abbreviation differs from POSIX standard (+03)".
+ These warnings should not otherwise affect zic's output and can safely be
+ ignored on today's platforms, as the warnings refer to a restriction in
+ POSIX.1-1988 that was removed in POSIX.1-2001. One way to suppress the
+ warnings is to upgrade to zic derived from tz releases 2015f and later.
+
+ Changes affecting future time stamps
+
+ New zones Europe/Astrakhan and Europe/Ulyanovsk for Astrakhan and
+ Ulyanovsk Oblasts, Russia, both of which will switch from +03 to +04 on
+ 2016-03-27 at 02:00 local time. They need distinct zones since their
+ post-1970 histories disagree. New zone Asia/Barnaul for Altai Krai and
+ Altai Republic, Russia, which will switch from +06 to +07 on the same date
+ and local time. The Astrakhan change is already official; the others have
+ passed the first reading in the State Duma and are extremely likely.
+ Also, Asia/Sakhalin moves from +10 to +11 on 2016-03-27 at 02:00.
+ (Thanks to Alexander Krivenyshev for the heads-up, and to Matt Johnson
+ and Stepan Golosunov for followup.)
+
+ As a trial of a new system that needs less information to be made up,
+ the new zones use numeric time zone abbreviations like "+04"
+ instead of invented abbreviations like "ASTT".
+
+ Haiti will not observe DST in 2016. (Thanks to Jean Antoine via
+ Steffen Thorsen.)
+
+ Palestine's spring-forward transition on 2016-03-26 is at 01:00, not 00:00.
+ (Thanks to Hannah Kreitem.) Guess future transitions will be March's last
+ Saturday at 01:00, not March's last Friday at 24:00.
+
+ Changes affecting past time stamps
+
+ Europe/Chisinau observed DST during 1990, and switched from +04 to
+ +03 at 1990-05-06 02:00, instead of switching from +03 to +02.
+ (Thanks to Stepan Golosunov.)
+
+ 1991 abbreviations in Europe/Samara should be SAMT/SAMST, not
+ KUYT/KUYST. (Thanks to Stepan Golosunov.)
+
+ Changes to code
+
+ tzselect's diagnostics and checking, and checktab.awk's checking,
+ have been improved. (Thanks to J William Piggott.)
+
+ tzcode now builds under MinGW. (Thanks to Ian Abbott and Esben Haabendal.)
+
+ tzselect now tests Julian-date TZ settings more accurately.
+ (Thanks to J William Piggott.)
+
+ Changes to commentary
+
+ Comments in zone tables have been improved. (Thanks to J William Piggott.)
+
+ tzselect again limits its menu comments so that menus fit on a
+ 24x80 alphanumeric display.
+
+ A new web page tz-how-to.html. (Thanks to Bill Seymour.)
+
+ In the Theory file, the description of possible time zone abbreviations in
+ tzdata has been cleaned up, as the old description was unclear and
+ inconsistent. (Thanks to Alain Mouette for reporting the problem.)
+
+
+Release 2016a - 2016-01-26 23:28:02 -0800
+
+ Changes affecting future time stamps
+
+ America/Cayman will not observe daylight saving this year after all.
+ Revert our guess that it would. (Thanks to Matt Johnson.)
+
+ Asia/Chita switches from +0800 to +0900 on 2016-03-27 at 02:00.
+ (Thanks to Alexander Krivenyshev.)
+
+ Asia/Tehran now has DST predictions for the year 2038 and later,
+ to be March 21 00:00 to September 21 00:00. This is likely better
+ than predicting no DST, albeit off by a day every now and then.
+
+ Changes affecting past and future time stamps
+
+ America/Metlakatla switched from PST all year to AKST/AKDT on
+ 2015-11-01 at 02:00. (Thanks to Steffen Thorsen.)
+
+ America/Santa_Isabel has been removed, and replaced with a
+ backward compatibility link to America/Tijuana. Its contents were
+ apparently based on a misreading of Mexican legislation.
+
+ Changes affecting past time stamps
+
+ Asia/Karachi's two transition times in 2002 were off by a minute.
+ (Thanks to Matt Johnson.)
+
+ Changes affecting build procedure
+
+ An installer can now combine leap seconds with use of the backzone file,
+ e.g., with 'make PACKRATDATA=backzone REDO=posix_right zones'.
+ The old 'make posix_packrat' rule is now marked as obsolescent.
+ (Thanks to Ian Abbott for an initial implementation.)
+
+ Changes affecting documentation and commentary
+
+ A new file LICENSE makes it easier to see that the code and data
+ are mostly public-domain. (Thanks to James Knight.) The three
+ non-public-domain files now use the current (3-clause) BSD license
+ instead of older versions of that license.
+
+ tz-link.htm mentions the BDE library (thanks to Andrew Paprocki),
+ CCTZ (thanks to Tim Parenti), TimeJones.com, and has a new section
+ on editing tz source files (with a mention of Sublime zoneinfo,
+ thanks to Gilmore Davidson).
+
+ The Theory and asia files now mention the 2015 book "The Global
+ Transformation of Time, 1870-1950", and cite a couple of reviews.
+
+ The America/Chicago entry now documents the informal use of US
+ central time in Fort Pierre, South Dakota. (Thanks to Rick
+ McDermid, Matt Johnson, and Steve Jones.)
+
+
+Release 2015g - 2015-10-01 00:39:51 -0700
+
+ Changes affecting future time stamps
+
+ Turkey's 2015 fall-back transition is scheduled for Nov. 8, not Oct. 25.
+ (Thanks to Fatih.)
+
+ Norfolk moves from +1130 to +1100 on 2015-10-04 at 02:00 local time.
+ (Thanks to Alexander Krivenyshev.)
+
+ Fiji's 2016 fall-back transition is scheduled for January 17, not 24.
+ (Thanks to Ken Rylander.)
+
+ Fort Nelson, British Columbia will not fall back on 2015-11-01. It has
+ effectively been on MST (-0700) since it advanced its clocks on 2015-03-08.
+ New zone America/Fort_Nelson. (Thanks to Matt Johnson.)
+
+ Changes affecting past time stamps
+
+ Norfolk observed DST from 1974-10-27 02:00 to 1975-03-02 02:00.
+
+ Changes affecting code
+
+ localtime no longer mishandles America/Anchorage after 2037.
+ (Thanks to Bradley White for reporting the bug.)
+
+ On hosts with signed 32-bit time_t, localtime no longer mishandles
+ Pacific/Fiji after 2038-01-16 14:00 UTC.
+
+ The localtime module allows the variables 'timezone', 'daylight',
+ and 'altzone' to be in common storage shared with other modules,
+ and declares them in case the system <time.h> does not.
+ (Problems reported by Kees Dekker.)
+
+ On platforms with tm_zone, strftime.c now assumes it is not NULL.
+ This simplifies the code and is consistent with zdump.c.
+ (Problem reported by Christos Zoulas.)
+
+ Changes affecting documentation
+
+ The tzfile man page now documents that transition times denote the
+ starts (not the ends) of the corresponding time periods.
+ (Ambiguity reported by Bill Seymour.)
+
+
+Release 2015f - 2015-08-10 18:06:56 -0700
+
+ Changes affecting future time stamps
+
+ North Korea switches to +0830 on 2015-08-15. (Thanks to Steffen Thorsen.)
+ The abbreviation remains "KST". (Thanks to Robert Elz.)
+
+ Uruguay no longer observes DST. (Thanks to Steffen Thorsen
+ and Pablo Camargo.)
+
+ Changes affecting past and future time stamps
+
+ Moldova starts and ends DST at 00:00 UTC, not at 01:00 UTC.
+ (Thanks to Roman Tudos.)
+
+ Changes affecting data format and code
+
+ zic's '-y YEARISTYPE' option is no longer documented. The TYPE
+ field of a Rule line should now be '-'; the old values 'even',
+ 'odd', 'uspres', 'nonpres', 'nonuspres' were already undocumented.
+ Although the implementation has not changed, these features do not
+ work in the default installation, they are not used in the data,
+ and they are now considered obsolescent.
+
+ zic now checks that two rules don't take effect at the same time.
+ (Thanks to Jon Skeet and Arthur David Olson.) Constraints on
+ simultaneity are now documented.
+
+ The two characters '%z' in a zone format now stand for the UTC
+ offset, e.g., '-07' for seven hours behind UTC and '+0530' for
+ five hours and thirty minutes ahead. This better supports time
+ zone abbreviations conforming to POSIX.1-2001 and later.
+
+ Changes affecting installed data files
+
+ Comments for America/Halifax and America/Glace_Bay have been improved.
+ (Thanks to Brian Inglis.)
+
+ Data entries have been simplified for Atlantic/Canary, Europe/Simferopol,
+ Europe/Sofia, and Europe/Tallinn. This yields slightly smaller
+ installed data files for Europe/Simferopol and Europe/Tallinn.
+ It does not affect timestamps. (Thanks to Howard Hinnant.)
+
+ Changes affecting code
+
+ zdump and zic no longer warn about valid time zone abbreviations
+ like '-05'.
+
+ Some Visual Studio 2013 warnings have been suppressed.
+ (Thanks to Kees Dekker.)
+
+ 'date' no longer sets the time of day and its -a, -d, -n and -t
+ options have been removed. Long obsolescent, the implementation
+ of these features had porting problems. Builders no longer need
+ to configure HAVE_ADJTIME, HAVE_SETTIMEOFDAY, or HAVE_UTMPX_H.
+ (Thanks to Kees Dekker for pointing out the problem.)
+
+ Changes affecting documentation
+
+ The Theory file mentions naming issues earlier, as these seem to be
+ poorly publicized (thanks to Gilmore Davidson for reporting the problem).
+
+ tz-link.htm mentions Time Zone Database Parser (thanks to Howard Hinnant).
+
+ Mention that Herbert Samuel introduced the term "Summer Time".
+
+
+Release 2015e - 2015-06-13 10:56:02 -0700
+
+ Changes affecting future time stamps
+
+ Morocco will suspend DST from 2015-06-14 03:00 through 2015-07-19 02:00,
+ not 06-13 and 07-18 as we had guessed. (Thanks to Milamber.)
+
+ Assume Cayman Islands will observe DST starting next year, using US rules.
+ Although it isn't guaranteed, it is the most likely.
+
+ Changes affecting data format
+
+ The file 'iso3166.tab' now uses UTF-8, so that its entries can better
+ spell the names of Åland Islands, Côte d'Ivoire, and Réunion.
+
+ Changes affecting code
+
+ When displaying data, tzselect converts it to the current locale's
+ encoding if the iconv command works. (Problem reported by random832.)
+
+ tzselect no longer mishandles Dominica, fixing a bug introduced
+ in Release 2014f. (Problem reported by Owen Leibman.)
+
+ zic -l no longer fails when compiled with -DTZDEFAULT=\"/etc/localtime\".
+ This fixes a bug introduced in Release 2014f.
+ (Problem reported by Leonardo Chiquitto.)
+
+
+Release 2015d - 2015-04-24 08:09:46 -0700
+
+ Changes affecting future time stamps
+
+ Egypt will not observe DST in 2015 and will consider canceling it
+ permanently. For now, assume no DST indefinitely.
+ (Thanks to Ahmed Nazmy and Tim Parenti.)
+
+ Changes affecting past time stamps
+
+ America/Whitehorse switched from UT -09 to -08 on 1967-05-28, not
+ 1966-07-01. Also, Yukon's time zone history is documented better.
+ (Thanks to Brian Inglis and Dennis Ferguson.)
+
+ Change affecting past and future time zone abbreviations
+
+ The abbreviations for Hawaii-Aleutian standard and daylight times
+ have been changed from HAST/HADT to HST/HDT, as per US Government
+ Printing Office style. This affects only America/Adak since 1983,
+ as America/Honolulu was already using the new style.
+
+ Changes affecting code
+
+ zic has some minor performance improvements.
+
+
+Release 2015c - 2015-04-11 08:55:55 -0700
+
+ Changes affecting future time stamps
+
+ Egypt's spring-forward transition is at 24:00 on April's last Thursday,
+ not 00:00 on April's last Friday. 2015's transition will therefore be on
+ Thursday, April 30 at 24:00, not Friday, April 24 at 00:00. Similar fixes
+ apply to 2026, 2037, 2043, etc. (Thanks to Steffen Thorsen.)
+
+ Changes affecting past time stamps
+
+ The following changes affect some pre-1991 Chile-related time stamps
+ in America/Santiago, Antarctica/Palmer, and Pacific/Easter.
+
+ The 1910 transition was January 10, not January 1.
+
+ The 1918 transition was September 10, not September 1.
+
+ The UT -04 time observed from 1932 to 1942 is now considered to
+ be standard time, not year-round DST.
+
+ Santiago observed DST (UT -03) from 1946-07-15 through
+ 1946-08-31, then reverted to standard time, then switched to -05
+ on 1947-04-01.
+
+ Assume transitions before 1968 were at 00:00, since we have no data
+ saying otherwise.
+
+ The spring 1988 transition was 1988-10-09, not 1988-10-02.
+ The fall 1990 transition was 1990-03-11, not 1990-03-18.
+
+ Assume no UTC offset change for Pacific/Easter on 1890-01-01,
+ and omit all transitions on Pacific/Easter from 1942 through 1946
+ since we have no data suggesting that they existed.
+
+ One more zone has been turned into a link, as it differed
+ from an existing zone only for older time stamps. As usual,
+ this change affects UTC offsets in pre-1970 time stamps only.
+ The zone's old contents have been moved to the 'backzone' file.
+ The affected zone is America/Montreal.
+
+ Changes affecting commentary
+
+ Mention the TZUpdater tool.
+
+ Mention "The Time Now". (Thanks to Brandon Ramsey.)
+
+
+Release 2015b - 2015-03-19 23:28:11 -0700
+
+ Changes affecting future time stamps
+
+ Mongolia will start observing DST again this year, from the last
+ Saturday in March at 02:00 to the last Saturday in September at 00:00.
+ (Thanks to Ganbold Tsagaankhuu.)
+
+ Palestine will start DST on March 28, not March 27. Also,
+ correct the fall 2014 transition from September 26 to October 24.
+ Adjust future predictions accordingly. (Thanks to Steffen Thorsen.)
+
+ Changes affecting past time stamps
+
+ The 1982 zone shift in Pacific/Easter has been corrected, fixing a 2015a
+ regression. (Thanks to Stuart Bishop for reporting the problem.)
+
+ Some more zones have been turned into links, when they differed
+ from existing zones only for older time stamps. As usual,
+ these changes affect UTC offsets in pre-1970 time stamps only.
+ Their old contents have been moved to the 'backzone' file.
+ The affected zones are: America/Antigua, America/Cayman,
+ Pacific/Midway, and Pacific/Saipan.
+
+ Changes affecting time zone abbreviations
+
+ Correct the 1992-2010 DST abbreviation in Volgograd from "MSK" to "MSD".
+ (Thanks to Hank W.)
+
+ Changes affecting code
+
+ Fix integer overflow bug in reference 'mktime' implementation.
+ (Problem reported by Jörg Richter.)
+
+ Allow -Dtime_tz=time_t compilations, and allow -Dtime_tz=... libraries
+ to be used in the same executable as standard-library time_t functions.
+ (Problems reported by Bradley White.)
+
+ Changes affecting commentary
+
+ Cite the recent Mexican decree changing Quintana Roo's time zone.
+ (Thanks to Carlos Raúl Perasso.)
+
+ Likewise for the recent Chilean decree. (Thanks to Eduardo Romero Urra.)
+
+ Update info about Mars time.
+
+
+Release 2015a - 2015-01-29 22:35:20 -0800
+
+ Changes affecting future time stamps
+
+ The Mexican state of Quintana Roo, represented by America/Cancun,
+ will shift from Central Time with DST to Eastern Time without DST
+ on 2015-02-01 at 02:00. (Thanks to Steffen Thorsen and Gwillim Law.)
+
+ Chile will not change clocks in April or thereafter; its new standard time
+ will be its old daylight saving time. This affects America/Santiago,
+ Pacific/Easter, and Antarctica/Palmer. (Thanks to Juan Correa.)
+
+ New leap second 2015-06-30 23:59:60 UTC as per IERS Bulletin C 49.
+ (Thanks to Tim Parenti.)
+
+ Changes affecting past time stamps
+
+ Iceland observed DST in 1919 and 1921, and its 1939 fallback
+ transition was Oct. 29, not Nov. 29. Remove incorrect data from
+ Shanks about time in Iceland between 1837 and 1908.
+
+ Some more zones have been turned into links, when they differed
+ from existing zones only for older time stamps. As usual,
+ these changes affect UTC offsets in pre-1970 time stamps only.
+ Their old contents have been moved to the 'backzone' file.
+ The affected zones are: Asia/Aden, Asia/Bahrain, Asia/Kuwait,
+ and Asia/Muscat.
+
+ Changes affecting code
+
+ tzalloc now scrubs time zone abbreviations compatibly with the way
+ that tzset always has, by replacing invalid bytes with '_' and by
+ shortening too-long abbreviations.
+
+ tzselect ports to POSIX awk implementations, no longer mishandles
+ POSIX TZ settings when GNU awk is used, and reports POSIX TZ
+ settings to the user. (Thanks to Stefan Kuhn.)
+
+ Changes affecting build procedure
+
+ 'make check' now checks for links to links in the data.
+ One such link (for Africa/Asmera) has been fixed.
+ (Thanks to Stephen Colebourne for pointing out the problem.)
+
+ Changes affecting commentary
+
+ The leapseconds file commentary now mentions the expiration date.
+ (Problem reported by Martin Burnicki.)
+
+ Update Mexican Library of Congress URL.
+
+
+Release 2014j - 2014-11-10 17:37:11 -0800
+
+ Changes affecting current and future time stamps
+
+ Turks & Caicos' switch from US eastern time to UT -04 year-round
+ did not occur on 2014-11-02 at 02:00. It's currently scheduled
+ for 2015-11-01 at 02:00. (Thanks to Chris Walton.)
+
+ Changes affecting past time stamps
+
+ Many pre-1989 time stamps have been corrected for Asia/Seoul and
+ Asia/Pyongyang, based on sources for the Korean-language Wikipedia
+ entry for time in Korea. (Thanks to Sanghyuk Jung.) Also, no
+ longer guess that Pyongyang mimicked Seoul time after World War II,
+ as this is politically implausible.
+
+ Some more zones have been turned into links, when they differed
+ from existing zones only for older time stamps. As usual,
+ these changes affect UTC offsets in pre-1970 time stamps only.
+ Their old contents have been moved to the 'backzone' file.
+ The affected zones are: Africa/Addis_Ababa, Africa/Asmara,
+ Africa/Dar_es_Salaam, Africa/Djibouti, Africa/Kampala,
+ Africa/Mogadishu, Indian/Antananarivo, Indian/Comoro, and
+ Indian/Mayotte.
+
+ Changes affecting commentary
+
+ The commentary is less enthusiastic about Shanks as a source,
+ and is more careful to distinguish UT from UTC.
+
+
+Release 2014i - 2014-10-21 22:04:57 -0700
+
+ Changes affecting future time stamps
+
+ Pacific/Fiji will observe DST from 2014-11-02 02:00 to 2015-01-18 03:00.
+ (Thanks to Ken Rylander for the heads-up.) Guess that future
+ years will use a similar pattern.
+
+ A new Zone Pacific/Bougainville, for the part of Papua New Guinea
+ that plans to switch from UT +10 to +11 on 2014-12-28 at 02:00.
+ (Thanks to Kiley Walbom for the heads-up.)
+
+ Changes affecting time zone abbreviations
+
+ Since Belarus is not changing its clocks even though Moscow is,
+ the time zone abbreviation in Europe/Minsk is changing from FET
+ to its more-traditional value MSK on 2014-10-26 at 01:00.
+ (Thanks to Alexander Bokovoy for the heads-up about Belarus.)
+
+ The new abbreviation IDT stands for the pre-1976 use of UT +08 in
+ Indochina, to distinguish it better from ICT (+07).
+
+ Changes affecting past time stamps
+
+ Many time stamps have been corrected for Asia/Ho_Chi_Minh before 1976
+ (thanks to Trần Ngọc Quân for an indirect pointer to Trần Tiến Bình's
+ authoritative book). Asia/Ho_Chi_Minh has been added to
+ zone1970.tab, to give tzselect users in Vietnam two choices,
+ since north and south Vietnam disagreed after our 1970 cutoff.
+
+ Asia/Phnom_Penh and Asia/Vientiane have been turned into links, as
+ they differed from existing zones only for older time stamps. As
+ usual, these changes affect pre-1970 time stamps only. Their old
+ contents have been moved to the 'backzone' file.
+
+ Changes affecting code
+
+ The time-related library functions now set errno on failure, and
+ some crashes in the new tzalloc-related library functions have
+ been fixed. (Thanks to Christos Zoulas for reporting most of
+ these problems and for suggesting fixes.)
+
+ If USG_COMPAT is defined and the requested time stamp is standard time,
+ the tz library's localtime and mktime functions now set the extern
+ variable timezone to a value appropriate for that time stamp; and
+ similarly for ALTZONE, daylight saving time, and the altzone variable.
+ This change is a companion to the tzname change in 2014h, and is
+ designed to make timezone and altzone more compatible with tzname.
+
+ The tz library's functions now set errno to EOVERFLOW if they fail
+ because the result cannot be represented. ctime and ctime_r now
+ return NULL and set errno when a time stamp is out of range, rather
+ than having undefined behavior.
+
+ Some bugs associated with the new 2014g functions have been fixed.
+ This includes a bug that largely incapacitated the new functions
+ time2posix_z and posix2time_z. (Thanks to Christos Zoulas.)
+ It also includes some uses of uninitialized variables after tzalloc.
+ The new code uses the standard type 'ssize_t', which the Makefile
+ now gives porting advice about.
+
+ Changes affecting commentary
+
+ Updated URLs for NRC Canada (thanks to Matt Johnson and Brian Inglis).
+
+
+Release 2014h - 2014-09-25 18:59:03 -0700
+
+ Changes affecting past time stamps
+
+ America/Jamaica's 1974 spring-forward transition was Jan. 6, not Apr. 28.
+
+ Shanks says Asia/Novokuznetsk switched from LMT (not "NMT") on 1924-05-01,
+ not 1920-01-06. The old entry was based on a misinterpretation of Shanks.
+
+ Some more zones have been turned into links, when they differed
+ from existing zones only for older time stamps. As usual,
+ these changes affect UTC offsets in pre-1970 time stamps only.
+ Their old contents have been moved to the 'backzone' file.
+ The affected zones are: Africa/Blantyre, Africa/Bujumbura,
+ Africa/Gaborone, Africa/Harare, Africa/Kigali, Africa/Lubumbashi,
+ Africa/Lusaka, Africa/Maseru, and Africa/Mbabane.
+
+ Changes affecting code
+
+ zdump -V and -v now output gmtoff= values on all platforms,
+ not merely on platforms defining TM_GMTOFF.
+
+ The tz library's localtime and mktime functions now set tzname to a value
+ appropriate for the requested time stamp, and zdump now uses this
+ on platforms not defining TM_ZONE, fixing a 2014g regression.
+ (Thanks to Tim Parenti for reporting the problem.)
+
+ The tz library no longer sets tzname if localtime or mktime fails.
+
+ zdump -c no longer mishandles transitions near year boundaries.
+ (Thanks to Tim Parenti for reporting the problem.)
+
+ An access to uninitialized data has been fixed.
+ (Thanks to Jörg Richter for reporting the problem.)
+
+ When THREAD_SAFE is defined, the code ports to the C11 memory model.
+ A memory leak has been fixed if ALL_STATE and THREAD_SAFE are defined
+ and two threads race to initialize data used by gmtime-like functions.
+ (Thanks to Andy Heninger for reporting the problems.)
+
+ Changes affecting build procedure
+
+ 'make check' now checks better for properly-sorted data.
+
+ Changes affecting documentation and commentary
+
+ zdump's gmtoff=N output is now documented, and its isdst=D output
+ is now documented to possibly output D values other than 0 or 1.
+
+ zdump -c's treatment of years is now documented to use the
+ Gregorian calendar and Universal Time without leap seconds,
+ and its behavior at cutoff boundaries is now documented better.
+ (Thanks to Arthur David Olson and Tim Parenti for reporting the problems.)
+
+ Programs are now documented to use the proleptic Gregorian calendar.
+ (Thanks to Alan Barrett for the suggestion.)
+
+ Fractional-second GMT offsets have been documented for civil time
+ in 19th-century Chennai, Jakarta, and New York.
+
+
+Release 2014g - 2014-08-28 12:31:23 -0700
+
+ Changes affecting future time stamps
+
+ Turks & Caicos is switching from US eastern time to UT -04
+ year-round, modeled as a switch on 2014-11-02 at 02:00.
+ [As noted in 2014j, this switch was later delayed.]
+
+ Changes affecting past time stamps
+
+ Time in Russia or the USSR before 1926 or so has been corrected by
+ a few seconds in the following zones: Asia/Irkutsk,
+ Asia/Krasnoyarsk, Asia/Omsk, Asia/Samarkand, Asia/Tbilisi,
+ Asia/Vladivostok, Asia/Yakutsk, Europe/Riga, Europe/Samara. For
+ Asia/Yekaterinburg the correction is a few minutes. (Thanks to
+ Vladimir Karpinsky.)
+
+ The Portuguese decree of 1911-05-26 took effect on 1912-01-01.
+ This affects 1911 time stamps in Africa/Bissau, Africa/Luanda,
+ Atlantic/Azores, and Atlantic/Madeira. Also, Lisbon's pre-1912
+ GMT offset was -0:36:45 (rounded from -0:36:44.68), not -0:36:32.
+ (Thanks to Stephen Colebourne for pointing to the decree.)
+
+ Asia/Dhaka ended DST on 2009-12-31 at 24:00, not 23:59.
+
+ A new file 'backzone' contains data which may appeal to
+ connoisseurs of old time stamps, although it is out of scope for
+ the tz database, is often poorly sourced, and contains some data
+ that is known to be incorrect. The new file is not recommended
+ for ordinary use and its entries are not installed by default.
+ (Thanks to Lester Caine for the high-quality Jersey, Guernsey, and
+ Isle of Man entries.)
+
+ Some more zones have been turned into links, when they differed
+ from existing zones only for older time stamps. As usual,
+ these changes affect UTC offsets in pre-1970 time stamps only.
+ Their old contents have been moved to the 'backzone' file.
+ The affected zones are: Africa/Bangui, Africa/Brazzaville,
+ Africa/Douala, Africa/Kinshasa, Africa/Libreville, Africa/Luanda,
+ Africa/Malabo, Africa/Niamey, and Africa/Porto-Novo.
+
+ Changes affecting code
+
+ Unless NETBSD_INSPIRED is defined to 0, the tz library now
+ supplies functions for creating and using objects that represent
+ time zones. The new functions are tzalloc, tzfree, localtime_rz,
+ mktime_z, and (if STD_INSPIRED is also defined) posix2time_z and
+ time2posix_z. They are intended for performance: for example,
+ localtime_rz (unlike localtime_r) is trivially thread-safe without
+ locking. (Thanks to Christos Zoulas for proposing NetBSD-inspired
+ functions, and to Alan Barrett and Jonathan Lennox for helping to
+ debug the change.)
+
+ zdump now builds with the tz library unless USE_LTZ is defined to 0,
+ This lets zdump use tz features even if the system library lacks them.
+ To build zdump with the system library, use 'make CFLAGS=-DUSE_LTZ=0
+ TZDOBJS=zdump.o CHECK_TIME_T_ALTERNATIVES='.
+
+ zdump now uses localtime_rz if available, as it's significantly faster,
+ and it can help zdump better diagnose invalid time zone names.
+ Define HAVE_LOCALTIME_RZ to 0 to suppress this. HAVE_LOCALTIME_RZ
+ defaults to 1 if NETBSD_INSPIRED && USE_LTZ. When localtime_rz is
+ not available, zdump now uses localtime_r and tzset if available,
+ as this is a bit cleaner and faster than plain localtime. Compile
+ with -DHAVE_LOCALTIME_R=0 and/or -DHAVE_TZSET=0 if your system
+ lacks these two functions.
+
+ If THREAD_SAFE is defined to 1, the tz library is now thread-safe.
+ Although not needed for tz's own applications, which are single-threaded,
+ this supports POSIX better if the tz library is used in multithreaded apps.
+
+ Some crashes have been fixed when zdump or the tz library is given
+ invalid or outlandish input.
+
+ The tz library no longer mishandles leap seconds on platforms with
+ unsigned time_t in time zones that lack ordinary transitions after 1970.
+
+ The tz code now attempts to infer TM_GMTOFF and TM_ZONE if not
+ already defined, to make it easier to configure on common platforms.
+ Define NO_TM_GMTOFF and NO_TM_ZONE to suppress this.
+
+ Unless the new macro UNINIT_TRAP is defined to 1, the tz code now
+ assumes that reading uninitialized memory yields garbage values
+ but does not cause other problems such as traps.
+
+ If TM_GMTOFF is defined and UNINIT_TRAP is 0, mktime is now
+ more likely to guess right for ambiguous time stamps near
+ transitions where tm_isdst does not change.
+
+ If HAVE_STRFTIME_L is defined to 1, the tz library now defines
+ strftime_l for compatibility with recent versions of POSIX.
+ Only the C locale is supported, though. HAVE_STRFTIME_L defaults
+ to 1 on recent POSIX versions, and to 0 otherwise.
+
+ tzselect -c now uses a hybrid distance measure that works better
+ in Africa. (Thanks to Alan Barrett for noting the problem.)
+
+ The C source code now ports to NetBSD when GCC_DEBUG_FLAGS is used,
+ or when time_tz is defined.
+
+ When HAVE_UTMPX_H is set the 'date' command now builds on systems
+ whose <utmpx.h> file does not define WTMPX_FILE, and when setting
+ the date it updates the wtmpx file if _PATH_WTMPX is defined.
+ This affects GNU/Linux and similar systems.
+
+ For easier maintenance later, some C code has been simplified,
+ some lint has been removed, and the code has been tweaked so that
+ plain 'make' is more likely to work.
+
+ The C type 'bool' is now used for boolean values, instead of 'int'.
+
+ The long-obsolete LOCALE_HOME code has been removed.
+
+ The long-obsolete 'gtime' function has been removed.
+
+ Changes affecting build procedure
+
+ 'zdump' no longer links in ialloc.o, as it's not needed.
+
+ 'make check_time_t_alternatives' no longer assumes GNU diff.
+
+ Changes affecting distribution tarballs
+
+ The files checktab.awk and zoneinfo2tdf.pl are now distributed in
+ the tzdata tarball instead of the tzcode tarball, since they help
+ maintain the data. The NEWS and Theory files are now also
+ distributed in the tzdata tarball, as they're relevant for data.
+ (Thanks to Alan Barrett for pointing this out.) Also, the
+ leapseconds.awk file is no longer distributed in the tzcode
+ tarball, since it belongs in the tzdata tarball (where 2014f
+ inadvertently also distributed it).
+
+ Changes affecting documentation and commentary
+
+ A new file CONTRIBUTING is distributed. (Thanks to Tim Parenti for
+ suggesting a CONTRIBUTING file, and to Tony Finch and Walter Harms
+ for debugging it.)
+
+ The man pages have been updated to use function prototypes,
+ to document thread-safe variants like localtime_r, and to document
+ the NetBSD-inspired functions tzalloc, tzfree, localtime_rz, and
+ mktime_z.
+
+ The fields in Link lines have been renamed to be more descriptive
+ and more like the parameters of 'ln'. LINK-FROM has become TARGET,
+ and LINK-TO has become LINK-NAME.
+
+ tz-link.htm mentions the IETF's tzdist working group; Windows
+ Runtime etc. (thanks to Matt Johnson); and HP-UX's tztab.
+
+ Some broken URLs have been fixed in the commentary. (Thanks to
+ Lester Caine.)
+
+ Commentary about Philippines DST has been updated, and commentary
+ on pre-1970 time in India has been added.
+
+
+Release 2014f - 2014-08-05 17:42:36 -0700
+
+ Changes affecting future time stamps
+
+ Russia will subtract an hour from most of its time zones on 2014-10-26
+ at 02:00 local time. (Thanks to Alexander Krivenyshev.)
+ There are a few exceptions: Magadan Oblast (Asia/Magadan) and Zabaykalsky
+ Krai are subtracting two hours; conversely, Chukotka Autonomous Okrug
+ (Asia/Anadyr), Kamchatka Krai (Asia/Kamchatka), Kemerovo Oblast
+ (Asia/Novokuznetsk), and the Samara Oblast and the Udmurt Republic
+ (Europe/Samara) are not changing their clocks. The changed zones are
+ Europe/Kaliningrad, Europe/Moscow, Europe/Simferopol, Europe/Volgograd,
+ Asia/Yekaterinburg, Asia/Omsk, Asia/Novosibirsk, Asia/Krasnoyarsk,
+ Asia/Irkutsk, Asia/Yakutsk, Asia/Vladivostok, Asia/Khandyga,
+ Asia/Sakhalin, and Asia/Ust-Nera; Asia/Magadan will have two hours
+ subtracted; and Asia/Novokuznetsk's time zone abbreviation is affected,
+ but not its UTC offset. Two zones are added: Asia/Chita (split
+ from Asia/Yakutsk, and also with two hours subtracted) and
+ Asia/Srednekolymsk (split from Asia/Magadan, but with only one hour
+ subtracted). (Thanks to Tim Parenti for much of the above.)
+
+ Changes affecting time zone abbreviations
+
+ Australian eastern time zone abbreviations are now AEST/AEDT not EST,
+ and similarly for the other Australian zones. That is, for eastern
+ standard and daylight saving time the abbreviations are AEST and AEDT
+ instead of the former EST for both; similarly, ACST/ACDT, ACWST/ACWDT,
+ and AWST/AWDT are now used instead of the former CST, CWST, and WST.
+ This change does not affect UTC offsets, only time zone abbreviations.
+ (Thanks to Rich Tibbett and many others.)
+
+ Asia/Novokuznetsk shifts from NOVT to KRAT (remaining on UT +07)
+ effective 2014-10-26 at 02:00 local time.
+
+ The time zone abbreviation for Xinjiang Time (observed in Ürümqi)
+ has been changed from URUT to XJT. (Thanks to Luther Ma.)
+
+ Prefer MSK/MSD for Moscow time in Russia, even in other cities.
+ Similarly, prefer EET/EEST for eastern European time in Russia.
+
+ Change time zone abbreviations in (western) Samoa to use "ST" and
+ "DT" suffixes, as this is more likely to match common practice.
+ Prefix "W" to (western) Samoa time when its standard-time offset
+ disagrees with that of American Samoa.
+
+ America/Metlakatla now uses PST, not MeST, to abbreviate its time zone.
+
+ Time zone abbreviations have been updated for Japan's two time
+ zones used 1896-1937. JWST now stands for Western Standard
+ Time, and JCST for Central Standard Time (formerly this was CJT).
+ These abbreviations are now used for time in Korea, Taiwan,
+ and Sakhalin while controlled by Japan.
+
+ Changes affecting past time stamps
+
+ China's five zones have been simplified to two, since the post-1970
+ differences in the other three seem to have been imaginary. The
+ zones Asia/Harbin, Asia/Chongqing, and Asia/Kashgar have been
+ removed; backwards-compatibility links still work, albeit with
+ different behaviors for time stamps before May 1980. Asia/Urumqi's
+ 1980 transition to UT +08 has been removed, so that it is now at
+ +06 and not +08. (Thanks to Luther Ma and to Alois Treindl;
+ Treindl sent helpful translations of two papers by Guo Qingsheng.)
+
+ Some zones have been turned into links, when they differed from existing
+ zones only for older UTC offsets where data entries were likely invented.
+ These changes affect UTC offsets in pre-1970 time stamps only. This is
+ similar to the change in release 2013e, except this time for western
+ Africa. The affected zones are: Africa/Bamako, Africa/Banjul,
+ Africa/Conakry, Africa/Dakar, Africa/Freetown, Africa/Lome,
+ Africa/Nouakchott, Africa/Ouagadougou, Africa/Sao_Tome, and
+ Atlantic/St_Helena. This also affects the backwards-compatibility
+ link Africa/Timbuktu. (Thanks to Alan Barrett, Stephen Colebourne,
+ Tim Parenti, and David Patte for reporting problems in earlier
+ versions of this change.)
+
+ Asia/Shanghai's pre-standard-time UT offset has been changed from
+ 8:05:57 to 8:05:43, the location of Xujiahui Observatory. Its
+ transition to standard time has been changed from 1928 to 1901.
+
+ Asia/Taipei switched to JWST on 1896-01-01, then to JST on 1937-10-01,
+ then to CST on 1945-09-21 at 01:00, and did not observe DST in 1945.
+ In 1946 it observed DST from 05-15 through 09-30; in 1947
+ from 04-15 through 10-31; and in 1979 from 07-01 through 09-30.
+ (Thanks to Yu-Cheng Chuang.)
+
+ Asia/Riyadh's transition to standard time is now 1947-03-14, not 1950.
+
+ Europe/Helsinki's 1942 fall-back transition was 10-04 at 01:00, not
+ 10-03 at 00:00. (Thanks to Konstantin Hyppönen.)
+
+ Pacific/Pago_Pago has been changed from UT -11:30 to -11 for the
+ period from 1911 to 1950.
+
+ Pacific/Chatham has been changed to New Zealand standard time plus
+ 45 minutes for the period before 1957, reflecting a 1956 remark in
+ the New Zealand parliament.
+
+ Europe/Budapest has several pre-1946 corrections: in 1918 the transition
+ out of DST was on 09-16, not 09-29; in 1919 it was on 11-24, not 09-15; in
+ 1945 it was on 11-01, not 11-03; in 1941 the transition to DST was 04-08
+ not 04-06 at 02:00; and there was no DST in 1920.
+
+ Africa/Accra is now assumed to have observed DST from 1920 through 1935.
+
+ Time in Russia before 1927 or so has been corrected by a few seconds in
+ the following zones: Europe/Moscow, Asia/Irkutsk, Asia/Tbilisi,
+ Asia/Tashkent, Asia/Vladivostok, Asia/Yekaterinburg, Europe/Helsinki, and
+ Europe/Riga. Also, Moscow's location has been changed to its Kilometer 0
+ point. (Thanks to Vladimir Karpinsky for the Moscow changes.)
+
+ Changes affecting data format
+
+ A new file 'zone1970.tab' supersedes 'zone.tab' in the installed data.
+ The new file's extended format allows multiple country codes per zone.
+ The older file is still installed but is deprecated; its format is
+ not changing and it will still be distributed for a while, but new
+ applications should use the new file.
+
+ The new file format simplifies maintenance of obscure locations.
+ To test this, it adds coverage for the Crozet Islands and the
+ Scattered Islands. (Thanks to Tobias Conradi and Antoine Leca.)
+
+ The file 'iso3166.tab' is planned to switch from ASCII to UTF-8.
+ It is still ASCII now, but commentary about the switch has been added.
+ The new file 'zone1970.tab' already uses UTF-8.
+
+ Changes affecting code
+
+ 'localtime', 'mktime', etc. now use much less stack space if ALL_STATE
+ is defined. (Thanks to Elliott Hughes for reporting the problem.)
+
+ 'zic' no longer mishandles input when ignoring case in locales that
+ are not compatible with English, e.g., unibyte Turkish locales when
+ compiled with HAVE_GETTEXT.
+
+ Error diagnostics of 'zic' and 'yearistype' have been reworded so that
+ they no longer use ASCII '-' as if it were a dash.
+
+ 'zic' now rejects output file names that contain '.' or '..' components.
+ (Thanks to Tim Parenti for reporting the problem.)
+
+ 'zic -v' now warns about output file names that do not follow
+ POSIX rules, or that contain a digit or '.'. (Thanks to Arthur
+ David Olson for starting the ball rolling on this.)
+
+ Some lint has been removed when using GCC_DEBUG_FLAGS with GCC 4.9.0.
+
+ Changes affecting build procedure
+
+ 'zic' no longer links in localtime.o and asctime.o, as they're not needed.
+ (Thanks to John Cochran.)
+
+ Changes affecting documentation and commentary
+
+ The 'Theory' file documents legacy names, the longstanding
+ exceptions to the POSIX-inspired file name rules.
+
+ The 'zic' documentation clarifies the role of time types when
+ interpreting dates. (Thanks to Arthur David Olson.)
+
+ Documentation and commentary now prefer UTF-8 to US-ASCII,
+ allowing the use of proper accents in foreign words and names.
+ Code and data have not changed because of this. (Thanks to
+ Garrett Wollman, Ian Abbott, and Guy Harris for helping to debug
+ this.)
+
+ Non-HTML documentation and commentary now use plain-text URLs instead of
+ HTML insertions, and are more consistent about bracketing URLs when they
+ are not already surrounded by white space. (Thanks to suggestions by
+ Steffen Nurpmeso.)
+
+ There is new commentary about Xujiahui Observatory, the five time-zone
+ project in China from 1918 to 1949, timekeeping in Japanese-occupied
+ Shanghai, and Tibet Time in the 1950s. The sharp-eyed can spot the
+ warlord Jin Shuren in the data.
+
+ Commentary about the coverage of each Russian zone has been standardized.
+ (Thanks to Tim Parenti).
+
+ There is new commentary about contemporary timekeeping in Ethiopia.
+
+ Obsolete comments about a 2007 proposal for DST in Kuwait has been removed.
+
+ There is new commentary about time in Poland in 1919.
+
+ Proper credit has been given to DST inventor George Vernon Hudson.
+
+ Commentary about time in Metlakatla, AK and Resolute, NU has been
+ improved, with a new source for the former.
+
+ In zone.tab, Pacific/Easter no longer mentions Salas y Gómez, as it
+ is uninhabited.
+
+ Commentary about permanent Antarctic bases has been updated.
+
+ Several typos have been corrected. (Thanks to Tim Parenti for
+ contributing some of these fixes.)
+
+ tz-link.htm now mentions the JavaScript libraries Moment Timezone,
+ TimezoneJS.Date, Walltime-js, and Timezone. (Thanks to a heads-up
+ from Matt Johnson.) Also, it mentions the Go 'latlong' package.
+ (Thanks to a heads-up from Dirkjan Ochtman.)
+
+ The files usno1988, usno1989, usno1989a, usno1995, usno1997, and usno1998
+ have been removed. These obsolescent US Naval Observatory entries were no
+ longer helpful for maintenance. (Thanks to Tim Parenti for the suggestion.)
+
+
+Release 2014e - 2014-06-12 21:53:52 -0700
+
+ Changes affecting near-future time stamps
+
+ Egypt's 2014 Ramadan-based transitions are June 26 and July 31 at 24:00.
+ (Thanks to Imed Chihi.) Guess that from 2015 on Egypt will temporarily
+ switch to standard time at 24:00 the last Thursday before Ramadan, and
+ back to DST at 00:00 the first Friday after Ramadan.
+
+ Similarly, Morocco's are June 28 at 03:00 and August 2 at 02:00. (Thanks
+ to Milamber Space Network.) Guess that from 2015 on Morocco will
+ temporarily switch to standard time at 03:00 the last Saturday before
+ Ramadan, and back to DST at 02:00 the first Saturday after Ramadan.
+
+ Changes affecting past time stamps
+
+ The abbreviation "MSM" (Moscow Midsummer Time) is now used instead of
+ "MSD" for Moscow's double daylight time in summer 1921. Also, a typo
+ "VLASST" has been repaired to be "VLAST" for Vladivostok summer time
+ in 1991. (Thanks to Hank W. for reporting the problems.)
+
+ Changes affecting commentary
+
+ tz-link.htm now cites RFC 7265 for jCal, mentions PTP and the
+ draft CalDAV extension, updates URLs for TSP, TZInfo, IATA, and
+ removes stale pointers to World Time Explorer and WORLDTIME.
+
+
+Release 2014d - 2014-05-27 21:34:40 -0700
+
+ Changes affecting code
+
+ zic no longer generates files containing time stamps before the Big Bang.
+ This works around GNOME bug 730332
+ <https://bugzilla.gnome.org/show_bug.cgi?id=730332>.
+ (Thanks to Leonardo Chiquitto for reporting the bug, and to
+ Arthur David Olson and James Cloos for suggesting improvements to the fix.)
+
+ Changes affecting documentation
+
+ tz-link.htm now mentions GNOME.
+
+
+Release 2014c - 2014-05-13 07:44:13 -0700
+
+ Changes affecting near-future time stamps
+
+ Egypt observes DST starting 2014-05-15 at 24:00.
+ (Thanks to Ahmad El-Dardiry and Gunther Vermier.)
+ Details have not been announced, except that DST will not be observed
+ during Ramadan. Guess that DST will stop during the same Ramadan dates as
+ Morocco, and that Egypt's future spring and fall transitions will be the
+ same as 2010 when it last observed DST, namely April's last Friday at
+ 00:00 to September's last Thursday at 23:00 standard time. Also, guess
+ that Ramadan transitions will be at 00:00 standard time.
+
+ Changes affecting code
+
+ zic now generates transitions for minimum time values, eliminating guesswork
+ when handling low-valued time stamps. (Thanks to Arthur David Olson.)
+
+ Port to Cygwin sans glibc. (Thanks to Arthur David Olson.)
+
+ Changes affecting commentary and documentation
+
+ Remove now-confusing comment about Jordan. (Thanks to Oleksii Nochovnyi.)
+
+
+Release 2014b - 2014-03-24 21:28:50 -0700
+
+ Changes affecting near-future time stamps
+
+ Crimea switches to Moscow time on 2014-03-30 at 02:00 local time.
+ (Thanks to Alexander Krivenyshev.) Move its zone.tab entry from UA to RU.
+
+ New entry for Troll station, Antarctica. (Thanks to Paul-Inge Flakstad and
+ Bengt-Inge Larsson.) This is currently an approximation; a better version
+ will require the zic and localtime fixes mentioned below, and the plan is
+ to wait for a while until at least the zic fixes propagate.
+
+ Changes affecting code
+
+ 'zic' and 'localtime' no longer reject locations needing four transitions
+ per year for the foreseeable future. (Thanks to Andrew Main (Zefram).)
+ Also, 'zic' avoids some unlikely failures due to integer overflow.
+
+ Changes affecting build procedure
+
+ 'make check' now detects Rule lines defined but never used.
+ The NZAQ rules, an instance of this problem, have been removed.
+
+ Changes affecting commentary and documentation
+
+ Fix Tuesday/Thursday typo in description of time in Israel.
+ (Thanks to Bert Katz via Pavel Kharitonov and Mike Frysinger.)
+
+ Microsoft Windows 8.1 doesn't support tz database names. (Thanks
+ to Donald MacQueen.) Instead, the Microsoft Windows Store app
+ library supports them.
+
+ Add comments about Johnston Island time in the 1960s.
+ (Thanks to Lyle McElhaney.)
+
+ Morocco's 2014 DST start will be as predicted.
+ (Thanks to Sebastien Willemijns.)
+
+
+Release 2014a - 2014-03-07 23:30:29 -0800
+
+ Changes affecting near-future time stamps
+
+ Turkey begins DST on 2014-03-31, not 03-30. (Thanks to Faruk Pasin for
+ the heads-up, and to Tim Parenti for simplifying the update.)
+
+ Changes affecting past time stamps
+
+ Fiji ended DST on 2014-01-19 at 02:00, not the previously-scheduled 03:00.
+ (Thanks to Steffen Thorsen.)
+
+ Ukraine switched from Moscow to Eastern European time on 1990-07-01
+ (not 1992-01-01), and observed DST during the entire next winter.
+ (Thanks to Vladimir in Moscow via Alois Treindl.)
+
+ In 1988 Israel observed DST from 04-10 to 09-04, not 04-09 to 09-03.
+ (Thanks to Avigdor Finkelstein.)
+
+ Changes affecting code
+
+ A uninitialized-storage bug in 'localtime' has been fixed.
+ (Thanks to Logan Chien.)
+
+ Changes affecting the build procedure
+
+ The settings for 'make check_web' now default to Ubuntu 13.10.
+
+ Changes affecting commentary and documentation
+
+ The boundary of the US Pacific time zone is given more accurately.
+ (Thanks to Alan Mintz.)
+
+ Chile's 2014 DST will be as predicted. (Thanks to José Miguel Garrido.)
+
+ Paraguay's 2014 DST will be as predicted. (Thanks to Carlos Raúl Perasso.)
+
+ Better descriptions of countries with same time zone history as
+ Trinidad and Tobago since 1970. (Thanks to Alan Barrett for suggestion.)
+
+ Several changes affect tz-link.htm, the main web page.
+
+ Mention Time.is (thanks to Even Scharning) and WX-now (thanks to
+ David Braverman).
+
+ Mention xCal (Internet RFC 6321) and jCal.
+
+ Microsoft has some support for tz database names.
+
+ CLDR data formats include both XML and JSON.
+
+ Mention Maggiolo's map of solar vs standard time.
+ (Thanks to Arthur David Olson.)
+
+ Mention TZ4Net. (Thanks to Matt Johnson.)
+
+ Mention the timezone-olson Haskell package.
+
+ Mention zeitverschiebung.net. (Thanks to Martin Jäger.)
+
+ Remove moribund links to daylight-savings-time.info and to
+ Simple Timer + Clocks.
+
+ Update two links. (Thanks to Oscar van Vlijmen.)
+
+ Fix some formatting glitches, e.g., remove random newlines from
+ abbr elements' title attributes.
+
+
+Release 2013i - 2013-12-17 07:25:23 -0800
+
+ Changes affecting near-future time stamps:
+
+ Jordan switches back to standard time at 00:00 on December 20, 2013.
+ The 2006-2011 transition schedule is planned to resume in 2014.
+ (Thanks to Steffen Thorsen.)
+
+ Changes affecting past time stamps:
+
+ In 2004, Cuba began DST on March 28, not April 4.
+ (Thanks to Steffen Thorsen.)
+
+ Changes affecting code
+
+ The compile-time flag NOSOLAR has been removed, as nowadays the
+ benefit of slightly shrinking runtime table size is outweighed by the
+ cost of disallowing potential future updates that exceed old limits.
+
+ Changes affecting documentation and commentary
+
+ The files solar87, solar88, and solar89 are no longer distributed.
+ They were a negative experiment - that is, a demonstration that
+ tz data can represent solar time only with some difficulty and error.
+ Their presence in the distribution caused confusion, as Riyadh
+ civil time was generally not solar time in those years.
+
+ tz-link.htm now mentions Noda Time. (Thanks to Matt Johnson.)
+
+
+Release 2013h - 2013-10-25 15:32:32 -0700
+
+ Changes affecting current and future time stamps:
+
+ Libya has switched its UT offset back to +02 without DST, instead
+ of +01 with DST. (Thanks to Even Scharning.)
+
+ Western Sahara (Africa/El_Aaiun) uses Morocco's DST rules.
+ (Thanks to Gwillim Law.)
+
+ Changes affecting future time stamps:
+
+ Acre and (we guess) western Amazonas will switch from UT -04 to -05
+ on 2013-11-10. This affects America/Rio_Branco and America/Eirunepe.
+ (Thanks to Steffen Thorsen.)
+
+ Add entries for DST transitions in Morocco in the year 2038.
+ This avoids some year-2038 glitches introduced in 2013g.
+ (Thanks to Yoshito Umaoka for reporting the problem.)
+
+ Changes affecting API
+
+ The 'tzselect' command no longer requires the 'select' command,
+ and should now work with /bin/sh on more platforms. It also works
+ around a bug in BusyBox awk before version 1.21.0. (Thanks to
+ Patrick 'P. J.' McDermott and Alan Barrett.)
+
+ Changes affecting code
+
+ Fix localtime overflow bugs with 32-bit unsigned time_t.
+
+ zdump no longer assumes sscanf returns maximal values on overflow.
+
+ Changes affecting the build procedure
+
+ The builder can specify which programs to use, if any, instead of
+ 'ar' and 'ranlib', and libtz.a is now built locally before being
+ installed. (Thanks to Michael Forney.)
+
+ A dependency typo in the 'zdump' rule has been fixed.
+ (Thanks to Andrew Paprocki.)
+
+ The Makefile has been simplified by assuming that 'mkdir -p' and 'cp -f'
+ work as specified by POSIX.2-1992 or later; this is portable nowadays.
+
+ 'make clean' no longer removes 'leapseconds', since it's
+ host-independent and is part of the distribution.
+
+ The unused makefile macros TZCSRCS, TZDSRCS, DATESRCS have been removed.
+
+ Changes affecting documentation and commentary
+
+ tz-link.htm now mentions TC TIMEZONE's draft time zone service protocol
+ (thanks to Mike Douglass) and TimezoneJS.Date (thanks to Jim Fehrle).
+
+ Update URLs in tz-link page. Add URLs for Microsoft Windows, since
+ 8.1 introduces tz support. Remove URLs for Tru64 and UnixWare (no
+ longer maintained) and for old advisories. SOFA now does C.
+
+Release 2013g - 2013-09-30 21:08:26 -0700
+
+ Changes affecting current and near-future time stamps
+
+ Morocco now observes DST from the last Sunday in March to the last
+ Sunday in October, not April to September respectively. (Thanks
+ to Steffen Thorsen.)
+
+ Changes affecting 'zic'
+
+ 'zic' now runs on platforms that lack both hard links and symlinks.
+ (Thanks to Theo Veenker for reporting the problem, for MinGW.)
+ Also, fix some bugs on platforms that lack hard links but have symlinks.
+
+ 'zic -v' again warns that Asia/Tehran has no POSIX environment variable
+ to predict the far future, fixing a bug introduced in 2013e.
+
+ Changes affecting the build procedure
+
+ The 'leapseconds' file is again put into the tzdata tarball.
+ Also, 'leapseconds.awk', so tzdata is self-contained. (Thanks to
+ Matt Burgess and Ian Abbott.) The timestamps of these and other
+ dependent files in tarballs are adjusted more consistently.
+
+ Changes affecting documentation and commentary
+
+ The README file is now part of the data tarball as well as the code.
+ It now states that files are public domain unless otherwise specified.
+ (Thanks to Andrew Main (Zefram) for asking for clarifications.)
+ Its details about the 1989 release moved to a place of honor near
+ the end of NEWS.
+
+
+Release 2013f - 2013-09-24 23:37:36 -0700
+
+ Changes affecting near-future time stamps
+
+ Tocantins will very likely not observe DST starting this spring.
+ (Thanks to Steffen Thorsen.)
+
+ Jordan will likely stay at UT +03 indefinitely, and will not fall
+ back this fall.
+
+ Palestine will fall back at 00:00, not 01:00. (Thanks to Steffen Thorsen.)
+
+ Changes affecting API
+
+ The types of the global variables 'timezone' and 'altzone' (if present)
+ have been changed back to 'long'. This is required for 'timezone'
+ by POSIX, and for 'altzone' by common practice, e.g., Solaris 11.
+ These variables were originally 'long' in the tz code, but were
+ mistakenly changed to 'time_t' in 1987; nobody reported the
+ incompatibility until now. The difference matters on x32, where
+ 'long' is 32 bits and 'time_t' is 64. (Thanks to Elliott Hughes.)
+
+ Changes affecting the build procedure
+
+ Avoid long strings in leapseconds.awk to work around a mawk bug.
+ (Thanks to Cyril Baurand.)
+
+ Changes affecting documentation and commentary
+
+ New file 'NEWS' that contains release notes like this one.
+
+ Paraguay's law does not specify DST transition time; 00:00 is customary.
+ (Thanks to Waldemar Villamayor-Venialbo.)
+
+ Minor capitalization fixes.
+
+ Changes affecting version-control only
+
+ The experimental GitHub repository now contains annotated and
+ signed tags for recent releases, e.g., '2013e' for Release 2013e.
+ Releases are tagged starting with 2012e; earlier releases were
+ done differently, and tags would either not have a simple name or
+ not exactly match what was released.
+
+ 'make set-timestamps' is now simpler and a bit more portable.
+
+
+Release 2013e - 2013-09-19 23:50:04 -0700
+
+ Changes affecting near-future time stamps
+
+ This year Fiji will start DST on October 27, not October 20.
+ (Thanks to David Wheeler for the heads-up.) For now, guess that
+ Fiji will continue to spring forward the Sunday before the fourth
+ Monday in October.
+
+ Changes affecting current and future time zone abbreviations
+
+ Use WIB/WITA/WIT rather than WIT/CIT/EIT for alphabetic Indonesian
+ time zone abbreviations since 1932. (Thanks to George Ziegler,
+ Priyadi Iman Nurcahyo, Zakaria, Jason Grimes, Martin Pitt, and
+ Benny Lin.) This affects Asia/Dili, Asia/Jakarta, Asia/Jayapura,
+ Asia/Makassar, and Asia/Pontianak.
+
+ Use ART (UT -03, standard time), rather than WARST (also -03, but
+ daylight saving time) for San Luis, Argentina since 2009.
+
+ Changes affecting Godthåb time stamps after 2037 if version mismatch
+
+ Allow POSIX-like TZ strings where the transition time's hour can
+ range from -167 through 167, instead of the POSIX-required 0
+ through 24. E.g., TZ='FJT-12FJST,M10.3.1/146,M1.3.4/75' for the
+ new Fiji rules. This is a more-compact way to represent
+ far-future time stamps for America/Godthab, America/Santiago,
+ Antarctica/Palmer, Asia/Gaza, Asia/Hebron, Asia/Jerusalem,
+ Pacific/Easter, and Pacific/Fiji. Other zones are unaffected by
+ this change. (Derived from a suggestion by Arthur David Olson.)
+
+ Allow POSIX-like TZ strings where daylight saving time is in
+ effect all year. E.g., TZ='WART4WARST,J1/0,J365/25' for Western
+ Argentina Summer Time all year. This supports a more-compact way
+ to represent the 2013d data for America/Argentina/San_Luis.
+ Because of the change for San Luis noted above this change does not
+ affect the current data. (Thanks to Andrew Main (Zefram) for
+ suggestions that improved this change.)
+
+ Where these two TZ changes take effect, there is a minor extension
+ to the tz file format in that it allows new values for the
+ embedded TZ-format string, and the tz file format version number
+ has therefore been increased from 2 to 3 as a precaution.
+ Version-2-based client code should continue to work as before for
+ all time stamps before 2038. Existing version-2-based client code
+ (tzcode, GNU/Linux, Solaris) has been tested on version-3-format
+ files, and typically works in practice even for time stamps after
+ 2037; the only known exception is America/Godthab.
+
+ Changes affecting time stamps before 1970
+
+ Pacific/Johnston is now a link to Pacific/Honolulu. This corrects
+ some errors before 1947.
+
+ Some zones have been turned into links, when they differ from existing
+ zones only in older data entries that were likely invented or that
+ differ only in LMT or transitions from LMT. These changes affect
+ only time stamps before 1943. The affected zones are:
+ Africa/Juba, America/Anguilla, America/Aruba, America/Dominica,
+ America/Grenada, America/Guadeloupe, America/Marigot,
+ America/Montserrat, America/St_Barthelemy, America/St_Kitts,
+ America/St_Lucia, America/St_Thomas, America/St_Vincent,
+ America/Tortola, and Europe/Vaduz. (Thanks to Alois Treindl for
+ confirming that the old Europe/Vaduz zone was wrong and the new
+ link is better for WWII-era times.)
+
+ Change Kingston Mean Time from -5:07:12 to -5:07:11. This affects
+ America/Cayman, America/Jamaica and America/Grand_Turk time stamps
+ from 1890 to 1912.
+
+ Change the UT offset of Bern Mean Time from 0:29:44 to 0:29:46.
+ This affects Europe/Zurich time stamps from 1853 to 1894. (Thanks
+ to Alois Treindl).
+
+ Change the date of the circa-1850 Zurich transition from 1849-09-12
+ to 1853-07-16, overriding Shanks with data from Messerli about
+ postal and telegraph time in Switzerland.
+
+ Changes affecting time zone abbreviations before 1970
+
+ For Asia/Jakarta, use BMT (not JMT) for mean time from 1923 to 1932,
+ as Jakarta was called Batavia back then.
+
+ Changes affecting API
+
+ The 'zic' command now outputs a dummy transition when far-future
+ data can't be summarized using a TZ string, and uses a 402-year
+ window rather than a 400-year window. For the current data, this
+ affects only the Asia/Tehran file. It does not affect any of the
+ time stamps that this file represents, so zdump outputs the same
+ information as before. (Thanks to Andrew Main (Zefram).)
+
+ The 'date' command has a new '-r' option, which lets you specify
+ the integer time to display, a la FreeBSD.
+
+ The 'tzselect' command has two new options '-c' and '-n', which lets you
+ select a zone based on latitude and longitude.
+
+ The 'zic' command's '-v' option now warns about constructs that
+ require the new version-3 binary file format. (Thanks to Arthur
+ David Olson for the suggestion.)
+
+ Support for floating-point time_t has been removed.
+ It was always dicey, and POSIX no longer requires it.
+ (Thanks to Eric Blake for suggesting to the POSIX committee to
+ remove it, and thanks to Alan Barrett, Clive D.W. Feather, Andy
+ Heninger, Arthur David Olson, and Alois Treindl, for reporting
+ bugs and elucidating some of the corners of the old floating-point
+ implementation.)
+
+ The signatures of 'offtime', 'timeoff', and 'gtime' have been
+ changed back to the old practice of using 'long' to represent UT
+ offsets. This had been inadvertently and mistakenly changed to
+ 'int_fast32_t'. (Thanks to Christos Zoulas.)
+
+ The code avoids undefined behavior on integer overflow in some
+ more places, including gmtime, localtime, mktime and zdump.
+
+ Changes affecting the zdump utility
+
+ zdump now outputs "UT" when referring to Universal Time, not "UTC".
+ "UTC" does not make sense for time stamps that predate the introduction
+ of UTC, whereas "UT", a more-generic term, does. (Thanks to Steve Allen
+ for clarifying UT vs UTC.)
+
+ Data changes affecting behavior of tzselect and similar programs
+
+ Country code BQ is now called the more-common name "Caribbean Netherlands"
+ rather than the more-official "Bonaire, St Eustatius & Saba".
+
+ Remove from zone.tab the names America/Montreal, America/Shiprock,
+ and Antarctica/South_Pole, as they are equivalent to existing
+ same-country-code zones for post-1970 time stamps. The data entries for
+ these names are unchanged, so the names continue to work as before.
+
+ Changes affecting code internals
+
+ zic -c now runs way faster on 64-bit hosts when given large numbers.
+
+ zic now uses vfprintf to avoid allocating and freeing some memory.
+
+ tzselect now computes the list of continents from the data,
+ rather than have it hard-coded.
+
+ Minor changes pacify GCC 4.7.3 and GCC 4.8.1.
+
+ Changes affecting the build procedure
+
+ The 'leapseconds' file is now generated automatically from a
+ new file 'leap-seconds.list', which is a copy of
+ <ftp://time.nist.gov/pub/leap-seconds.list>.
+ A new source file 'leapseconds.awk' implements this.
+ The goal is simplification of the future maintenance of 'leapseconds'.
+
+ When building the 'posix' or 'right' subdirectories, if the
+ subdirectory would be a copy of the default subdirectory, it is
+ now made a symbolic link if that is supported. This saves about
+ 2 MB of file system space.
+
+ The links America/Shiprock and Antarctica/South_Pole have been
+ moved to the 'backward' file. This affects only nondefault builds
+ that omit 'backward'.
+
+ Changes affecting version-control only
+
+ .gitignore now ignores 'date'.
+
+ Changes affecting documentation and commentary
+
+ Changes to the 'tzfile' man page
+
+ It now mentions that the binary file format may be extended in
+ future versions by appending data.
+
+ It now refers to the 'zdump' and 'zic' man pages.
+
+ Changes to the 'zic' man page
+
+ It lists conditions that elicit a warning with '-v'.
+
+ It says that the behavior is unspecified when duplicate names
+ are given, or if the source of one link is the target of another.
+
+ Its examples are updated to match the latest data.
+
+ The definition of white space has been clarified slightly.
+ (Thanks to Michael Deckers.)
+
+ Changes to the 'Theory' file
+
+ There is a new section about the accuracy of the tz database,
+ describing the many ways that errors can creep in, and
+ explaining why so many of the pre-1970 time stamps are wrong or
+ misleading (thanks to Steve Allen, Lester Caine, and Garrett
+ Wollman for discussions that contributed to this).
+
+ The 'Theory' file describes LMT better (this follows a
+ suggestion by Guy Harris).
+
+ It refers to the 2013 edition of POSIX rather than the 2004 edition.
+
+ It's mentioned that excluding 'backward' should not affect the
+ other data, and it suggests at least one zone.tab name per
+ inhabited country (thanks to Stephen Colebourne).
+
+ Some longstanding restrictions on names are documented, e.g.,
+ 'America/New_York' precludes 'America/New_York/Bronx'.
+
+ It gives more reasons for the 1970 cutoff.
+
+ It now mentions which time_t variants are supported, such as
+ signed integer time_t. (Thanks to Paul Goyette for reporting
+ typos in an experimental version of this change.)
+
+ (Thanks to Philip Newton for correcting typos in these changes.)
+
+ Documentation and commentary is more careful to distinguish UT in
+ general from UTC in particular. (Thanks to Steve Allen.)
+
+ Add a better source for the Zurich 1894 transition.
+ (Thanks to Pierre-Yves Berger.)
+
+ Update shapefile citations in tz-link.htm. (Thanks to Guy Harris.)
+
+
+Release 2013d - 2013-07-05 07:38:01 -0700
+
+ Changes affecting future time stamps:
+
+ Morocco's midsummer transitions this year are July 7 and August 10,
+ not July 9 and August 8. (Thanks to Andrew Paprocki.)
+
+ Israel now falls back on the last Sunday of October.
+ (Thanks to Ephraim Silverberg.)
+
+ Changes affecting past time stamps:
+
+ Specify Jerusalem's location more precisely; this changes the pre-1880
+ times by 2 s.
+
+ Changing affecting metadata only:
+
+ Fix typos in the entries for country codes BQ and SX.
+
+ Changes affecting code:
+
+ Rework the code to fix a bug with handling Australia/Macquarie on
+ 32-bit hosts (thanks to Arthur David Olson).
+
+ Port to platforms like NetBSD, where time_t can be wider than long.
+
+ Add support for testing time_t types other than the system's.
+ Run 'make check_time_t_alternatives' to try this out.
+ Currently, the tests fail for unsigned time_t;
+ this should get fixed at some point.
+
+ Changes affecting documentation and commentary:
+
+ Deemphasize the significance of national borders.
+
+ Update the zdump man page.
+
+ Remove obsolete NOID comment (thanks to Denis Excoffier).
+
+ Update several URLs and comments in the web pages.
+
+ Spelling fixes (thanks to Kevin Lyda and Jonathan Leffler).
+
+ Update URL for CLDR Zone->Tzid table (thanks to Yoshito Umaoka).
+
+
+Release 2013c - 2013-04-19 16:17:40 -0700
+
+ Changes affecting current and future time stamps:
+
+ Palestine observed DST starting March 29, 2013. (Thanks to
+ Steffen Thorsen.) From 2013 on, Gaza and Hebron both observe DST,
+ with the predicted rules being the last Thursday in March at 24:00
+ to the first Friday on or after September 21 at 01:00.
+
+ Assume that the recent change to Paraguay's DST rules is permanent,
+ by moving the end of DST to the 4th Sunday in March every year.
+ (Thanks to Carlos Raúl Perasso.)
+
+ Changes affecting past time stamps:
+
+ Fix some historical data for Palestine to agree with that of
+ timeanddate.com, as follows:
+
+ The spring 2008 change in Gaza and Hebron was on 00:00 Mar 28, not
+ 00:00 Apr 1.
+
+ The fall 2009 change in Gaza and Hebron on Sep 4 was at 01:00, not
+ 02:00.
+
+ The spring 2010 change in Hebron was 00:00 Mar 26, not 00:01 Mar 27.
+
+ The spring 2011 change in Gaza was 00:01 Apr 1, not 12:01 Apr 2.
+
+ The spring 2011 change in Hebron on Apr 1 was at 00:01, not 12:01.
+
+ The fall 2011 change in Hebron on Sep 30 was at 00:00, not 03:00.
+
+ Fix times of habitation for Macquarie to agree with the Tasmania
+ Parks & Wildlife Service history, which indicates that permanent
+ habitation was 1899-1919 and 1948 on.
+
+ Changing affecting metadata only:
+
+ Macquarie Island is politically part of Australia, not Antarctica.
+ (Thanks to Tobias Conradi.)
+
+ Sort Macquarie more-consistently with other parts of Australia.
+ (Thanks to Tim Parenti.)
+
+
+Release 2013b - 2013-03-10 22:33:40 -0700
+
+ Changes affecting current and future time stamps:
+
+ Haiti uses US daylight-saving rules this year, and presumably future years.
+ This changes time stamps starting today. (Thanks to Steffen Thorsen.)
+
+ Paraguay will end DST on March 24 this year.
+ (Thanks to Steffen Thorsen.) For now, assume it's just this year.
+
+ Morocco does not observe DST during Ramadan;
+ try to predict Ramadan in Morocco as best we can.
+ (Thanks to Erik Homoet for the heads-up.)
+
+ Changes affecting commentary:
+
+ Update URLs in tz-link page. Add URLs for webOS, BB10, iOS.
+ Update URL for Solaris. Mention Internet RFC 6557.
+ Update Internet RFCs 2445->5545, 2822->5322.
+ Switch from FTP to HTTP for Internet RFCs.
+
+
+Release 2013a - 2013-02-27 09:20:35 -0800
+
+ Change affecting binary data format:
+
+ The zone offset at the end of version-2-format zone files is now
+ allowed to be 24:00, as per POSIX.1-2008. (Thanks to Arthur David Olson.)
+
+ Changes affecting current and future time stamps:
+
+ Chile's 2013 rules, and we guess rules for 2014 and later, will be
+ the same as 2012, namely Apr Sun>=23 03:00 UTC to Sep Sun>=2 04:00 UTC.
+ (Thanks to Steffen Thorsen and Robert Elz.)
+
+ New Zones Asia/Khandyga, Asia/Ust-Nera, Europe/Busingen.
+ (Thanks to Tobias Conradi and Arthur David Olson.)
+
+ Many changes affect historical time stamps before 1940.
+ These were deduced from: Milne J. Civil time. Geogr J. 1899
+ Feb;13(2):173-94 <http://www.jstor.org/stable/1774359>.
+
+ Changes affecting the code:
+
+ Fix zic bug that mishandled Egypt's 2010 changes (this also affected
+ the data). (Thanks to Arthur David Olson.)
+
+ Fix localtime bug when time_t is unsigned and data files were generated
+ by a signed time_t system. (Thanks to Doug Bailey for reporting and
+ to Arthur David Olson for fixing.)
+
+ Allow the email address for bug reports to be set by the packager.
+ The default is tz@iana.org, as before. (Thanks to Joseph S. Myers.)
+
+ Update HTML checking to be compatible with Ubuntu 12.10.
+
+ Check that files are a safe subset of ASCII. At some point we may
+ relax this requirement to a safe subset of UTF-8. Without the
+ check, some non-UTF-8 encodings were leaking into the distribution.
+
+ Commentary changes:
+
+ Restore a comment about copyright notices that was inadvertently deleted.
+ (Thanks to Arthur David Olson.)
+
+ Improve the commentary about which districts observe what times
+ in Russia. (Thanks to Oscar van Vlijmen and Arthur David Olson).
+
+ Add web page links to tz.js.
+
+ Add "Run by the Monkeys" to tz-art. (Thanks to Arthur David Olson.)
+
+
+Release 2012j - 2012-11-12 18:34:49 -0800
+
+ Libya moved to CET this weekend, but with DST planned next year.
+ (Thanks to Even Scharning, Steffen Thorsen, and Tim Parenti.)
+
+ Signatures now have the extension .asc, not .sign, as that's more
+ standard. (Thanks to Phil Pennock.)
+
+ The output of 'zdump --version', and of 'zic --version', now
+ uses a format that is more typical for --version.
+ (Thanks to Joseph S. Myers.)
+
+ The output of 'tzselect --help', 'zdump --help', and 'zic --help'
+ now uses tz@iana.org rather than the old elsie address.
+
+ zic -v now complains about abbreviations that are less than 3
+ or more than 6 characters, as per Posix. Formerly, it checked
+ for abbreviations that were more than 3.
+
+ 'make public' no longer puts its temporary directory under /tmp,
+ and uses the just-built zic rather than the system zic.
+
+ Various fixes to documentation and commentary.
+
+
+Release 2012i - 2012-11-03 12:57:09 -0700
+
+ Cuba switches from DST tomorrow at 01:00. (Thanks to Steffen Thorsen.)
+
+ Linker flags can now be specified via LDFLAGS.
+ AWK now defaults to 'awk', not 'nawk'.
+ The shell in tzselect now defaults to /bin/bash, but this can
+ be overridden by specifying KSHELL.
+ The main web page now mentions the unofficial GitHub repository.
+ (Thanks to Mike Frysinger.)
+
+ Tarball signatures can now be built by running 'make signatures'.
+ There are also new makefile rules 'tarballs', 'check_public', and
+ separate makefile rules for each tarball and signature file.
+ A few makefile rules are now more portable to strict POSIX.
+
+ The main web page now lists the canonical IANA URL.
+
+
+Release 2012h - 2012-10-26 22:49:10 -0700
+
+ Bahia no longer has DST. (Thanks to Kelley Cook.)
+
+ Tocantins has DST. (Thanks to Rodrigo Severo.)
+
+ Israel has new DST rules next year. (Thanks to Ephraim Silverberg.)
+
+ Jordan stays on DST this winter. (Thanks to Steffen Thorsen.)
+
+ Web page updates.
+
+ More C modernization, except that at Arthur David Olson's suggestion
+ the instances of 'register' were kept.
+
+
+Release 2012g - 2012-10-17 20:59:45 -0700
+
+ Samoa fall 2012 and later. (Thanks to Nicholas Pereira and Robert Elz.)
+
+ Palestine fall 2012. (Thanks to Steffen Thorsen.)
+
+ Assume C89.
+
+ To attack the version-number problem, this release ships the file
+ 'Makefile' (which contains the release number) in both the tzcode and
+ the tzdata tarballs. The two Makefiles are identical, and should be
+ identical in any matching pair of tarballs, so it shouldn't matter
+ which order you extract the tarballs. Perhaps we can come up with a
+ better version-number scheme at some point; this scheme does have the
+ virtue of not adding more files.
+
+
+Release 2012f - 2012-09-12 23:17:03 -0700
+
+ * australasia (Pacific/Fiji): Fiji DST is October 21 through January
+ 20 this year. (Thanks to Steffen Thorsen.)
+
+
+Release 2012e - 2012-08-02 20:44:55 -0700
+
+ * australasia (Pacific/Fakaofo): Tokelau is UT +13, not +14.
+ (Thanks to Steffen Thorsen.)
+
+ * Use a single version number for both code and data.
+
+ * .gitignore: New file.
+
+ * Remove trailing white space.
+
+
+Release code2012c-data2012d - 2012-07-19 16:35:33 -0700
+
+ Changes for Morocco's time stamps, which take effect in a couple of
+ hours, along with infrastructure changes to accommodate how the tz
+ code and data are released on IANA.
+
+
+Release data2012c - 2012-03-27 12:17:25 -0400
+
+ africa
+ Summer time changes for Morocco (to start late April 2012)
+
+ asia
+ Changes for 2012 for Gaza & the West Bank (Hebron) and Syria
+
+ northamerica
+ Haiti following US/Canada rules for 2012 (and we're assuming,
+ for now anyway, for the future).
+
+
+Release 2012b - 2012-03-02 12:29:15 +0700
+
+ There is just one change to tzcode2012b (compared with 2012a):
+ the Makefile that was accidentally included with 2012a has been
+ replaced with the version that should have been there, which is
+ identical with the previous version (from tzcode2011i).
+
+ There are just two changes in tzdata2012b compared with 2012a.
+
+ Most significantly, summer time in Cuba has been delayed 3 weeks
+ (now starts April 1 rather than March 11). Since Mar 11 (the old start
+ date, as listed in 2012a) is just a little over a week away, this
+ change is urgent.
+
+ Less importantly, an excess tab in one of the changes in zone.tab
+ in 2012a has been removed.
+
+
+Release 2012a - 2012-03-01 18:28:10 +0700
+
+ The changes in tzcode2012a (compared to the previous version, 2011i)
+ are entirely to the README and tz-art.htm and tz-link.htm files, if
+ none of those concern you, you can ignore the code update. The changes
+ reflect the changed addresses for the mailing list and the code and
+ data distribution points & methods (and a link to DateTime::TimeZone::Tzfile
+ has been added to tz-link.htm).
+
+ In tzdata2012a (compared to the previous release, which was 2011n)
+ the major changes are:
+ Chile 2011/2012 and 2012/2013 summer time date adjustments.
+ Falkland Islands onto permanent summer time (we're assuming for the
+ foreseeable future, though 2012 is all we're fairly certain of.)
+ Armenia has abolished Summer Time.
+ Tokelau jumped the International Date Line back last December
+ (just the same as their near neighbour, Samoa).
+ America/Creston is a new zone for a small area of British Columbia
+ There will be a leapsecond 2012-06-30 23:59:60 UTC.
+
+ Other minor changes are:
+ Corrections to 1918 Canadian summer time end dates.
+ Updated URL for UK time zone history (in comments)
+ A few typos in Le Corre's list of free French place names (comments)
+
+
+Release data2011n - 2011-10-30 14:57:54 +0700
+
+ There are three changes of note - most urgently, Cuba (America/Havana)
+ has extended summer time by two weeks, now to end on Nov 13, rather than
+ the (already past) Oct 30. Second, the Pridnestrovian Moldavian Republic
+ (Europe/Tiraspol) decided not to split from the rest of Moldova after
+ all, and consequently that zone has been removed (again) and reinstated
+ in the "backward" file as a link to Europe/Chisinau. And third, the
+ end date for Fiji's summer time this summer was moved forward from the
+ earlier planned Feb 26, to Jan 22.
+
+ Apart from that, Moldova (MD) returns to a single entry in zone.tab
+ (and the incorrect syntax that was in the 2011m version of that file
+ is so fixed - it would have been fixed in a different way had this
+ change not happened - that's the "missing" sccs version id).
+
+
+Release data2011m - 2011-10-24 21:42:16 +0700
+
+ In particular, the typos in comments in the data (2011-11-17 should have
+ been 2011-10-17 as Alan Barrett noted, and spelling of Tiraspol that
+ Tim Parenti noted) have been fixed, and the change for Ukraine has been
+ made in all 4 Ukrainian zones, rather than just Kiev (again, thanks to
+ Tim Parenti, and also Denys Gavrysh)
+
+ In addition, I added Europe/Tiraspol to zone.tab.
+
+ This time, all the files have new version numbers... (including the files
+ otherwise unchanged in 2011m that were changed in 2011l but didn't get new
+ version numbers there...)
+
+
+Release data2011l - 2011-10-10 11:15:43 +0700
+
+ There are just 2 changes that cause different generated tzdata files from
+ zic, to Asia/Hebron and Pacific/Fiji - the possible change for Bahia, Brazil
+ is included, but commented out. Compared with the diff I sent out last week,
+ this version also includes attributions for the sources for the changes
+ (in much the same format as ado used, but the html tags have not been
+ checked, verified, or used in any way at all, so if there are errors there,
+ please let me know.)
+
+
+Release data2011k - 2011-09-20 17:54:03 -0400
+
+ [not summarized]
+
+
+Release data2011j - 2011-09-12 09:22:49 -0400
+
+ (contemporary changes for Samoa; past changes for Kenya, Uganda, and
+ Tanzania); there are also two spelling corrections to comments in
+ the australasia file (with thanks to Christos Zoulas).
+
+
+Release 2011i - 2011-08-29 05:56:32 -0400
+
+ [not summarized]
+
+
+Release data2011h - 2011-06-15 18:41:48 -0400
+
+ Russia and Curaçao changes
+
+
+Release 2011g - 2011-04-25 09:07:22 -0400
+
+ update the rules for Egypt to reflect its abandonment of DST this year
+
+
+Release 2011f - 2011-04-06 17:14:53 -0400
+
+ [not summarized]
+
+
+Release 2011e - 2011-03-31 16:04:38 -0400
+
+ Morocco, Chile, and tz-link changes
+
+
+Release 2011d - 2011-03-14 09:18:01 -0400
+
+ changes that impact present-day time stamps in Cuba, Samoa, and Turkey
+
+
+Release 2011c - 2011-03-07 09:30:09 -0500
+
+ These do affect current time stamps in Chile and Annette Island, Canada.
+
+
+Release 2011b - 2011-02-07 08:44:50 -0500
+
+ [not summarized]
+
+
+Release 2011a - 2011-01-24 10:30:16 -0500
+
+ [not summarized]
+
+
+Release data2010o - 2010-11-01 09:18:23 -0400
+
+ change to the end of DST in Fiji in 2011
+
+
+Release 2010n - 2010-10-25 08:19:17 -0400
+
+ [not summarized]
+
+
+Release 2010m - 2010-09-27 09:24:48 -0400
+
+ Hong Kong, Vostok, and zic.c changes
+
+
+Release 2010l - 2010-08-16 06:57:25 -0400
+
+ [not summarized]
+
+
+Release 2010k - 2010-07-26 10:42:27 -0400
+
+ [not summarized]
+
+
+Release 2010j - 2010-05-10 09:07:48 -0400
+
+ changes for Bahía de Banderas and for version naming
+
+
+Release data2010i - 2010-04-16 18:50:45 -0400
+
+ the end of DST in Morocco on 2010-08-08
+
+
+Release data2010h - 2010-04-05 09:58:56 -0400
+
+ [not summarized]
+
+
+Release data2010g - 2010-03-24 11:14:53 -0400
+
+ [not summarized]
+
+
+Release 2010f - 2010-03-22 09:45:46 -0400
+
+ [not summarized]
+
+
+Release data2010e - 2010-03-08 14:24:27 -0500
+
+ corrects the Dhaka bug found by Danvin Ruangchan
+
+
+Release data2010d - 2010-03-06 07:26:01 -0500
+
+ [not summarized]
+
+
+Release 2010c - 2010-03-01 09:20:58 -0500
+
+ changes including KRE's suggestion for earlier initialization of
+ "goahead" and "goback" structure elements
+
+
+Release code2010a - 2010-02-16 10:40:04 -0500
+
+ [not summarized]
+
+
+Release data2010b - 2010-01-20 12:37:01 -0500
+
+ Mexico changes
+
+
+Release data2010a - 2010-01-18 08:30:04 -0500
+
+ changes to Dhaka
+
+
+Release data2009u - 2009-12-26 08:32:28 -0500
+
+ changes to DST in Bangladesh
+
+
+Release 2009t - 2009-12-21 13:24:27 -0500
+
+ [not summarized]
+
+
+Release data2009s - 2009-11-14 10:26:32 -0500
+
+ (cosmetic) Antarctica change and the DST-in-Fiji-in-2009-and-2010 change
+
+
+Release 2009r - 2009-11-09 10:10:31 -0500
+
+ "antarctica" and "tz-link.htm" changes
+
+
+Release 2009q - 2009-11-02 09:12:40 -0500
+
+ with two corrections as reported by Eric Muller and Philip Newton
+
+
+Release data2009p - 2009-10-23 15:05:27 -0400
+
+ Argentina (including San Luis) changes (with the correction from
+ Mariano Absatz)
+
+
+Release data2009o - 2009-10-14 16:49:38 -0400
+
+ Samoa (commentary only), Pakistan, and Bangladesh changes
+
+
+Release data2009n - 2009-09-22 15:13:38 -0400
+
+ added commentary for Argentina and a change to the end of DST in
+ 2009 in Pakistan
+
+
+Release data2009m - 2009-09-03 10:23:43 -0400
+
+ Samoa and Palestine changes
+
+
+Release data2009l - 2009-08-14 09:13:07 -0400
+
+ Samoa (comments only) and Egypt
+
+
+Release 2009k - 2009-07-20 09:46:08 -0400
+
+ [not summarized]
+
+
+Release data2009j - 2009-06-15 06:43:59 -0400
+
+ Bangladesh change (with a short turnaround since the DST change is
+ impending)
+
+
+Release 2009i - 2009-06-08 09:21:22 -0400
+
+ updating for DST in Bangladesh this year
+
+
+Release 2009h - 2009-05-26 09:19:14 -0400
+
+ [not summarized]
+
+
+Release data2009g - 2009-04-20 16:34:07 -0400
+
+ Cairo
+
+
+Release data2009f - 2009-04-10 11:00:52 -0400
+
+ correct DST in Pakistan
+
+
+Release 2009e - 2009-04-06 09:08:11 -0400
+
+ [not summarized]
+
+
+Release 2009d - 2009-03-23 09:38:12 -0400
+
+ Morocco, Tunisia, Argentina, and American Astronomical Society changes
+
+
+Release data2009c - 2009-03-16 09:47:51 -0400
+
+ change to the start of Cuban DST
+
+
+Release 2009b - 2009-02-09 11:15:22 -0500
+
+ [not summarized]
+
+
+Release 2009a - 2009-01-21 10:09:39 -0500
+
+ [not summarized]
+
+
+Release data2008i - 2008-10-21 12:10:25 -0400
+
+ southamerica and zone.tab files, with Argentina DST rule changes and
+ United States zone reordering and recommenting
+
+
+Release 2008h - 2008-10-13 07:33:56 -0400
+
+ [not summarized]
+
+
+Release 2008g - 2008-10-06 09:03:18 -0400
+
+ Fix a broken HTML anchor and update Brazil's DST transitions;
+ there's also a slight reordering of information in tz-art.htm.
+
+
+Release data2008f - 2008-09-09 22:33:26 -0400
+
+ [not summarized]
+
+
+Release 2008e - 2008-07-28 14:11:17 -0400
+
+ changes by Arthur David Olson and Jesper Nørgaard Welen
+
+
+Release data2008d - 2008-07-07 09:51:38 -0400
+
+ changes by Arthur David Olson, Paul Eggert, and Rodrigo Severo
+
+
+Release data2008c - 2008-05-19 17:48:03 -0400
+
+ Pakistan, Morocco, and Mongolia
+
+
+Release data2008b - 2008-03-24 08:30:59 -0400
+
+ including renaming Asia/Calcutta to Asia/Kolkata, with a backward
+ link provided
+
+
+Release 2008a - 2008-03-08 05:42:16 -0500
+
+ [not summarized]
+
+
+Release 2007k - 2007-12-31 10:25:22 -0500
+
+ most importantly, changes to the "southamerica" file based on
+ Argentina's readoption of daylight saving time
+
+
+Release 2007j - 2007-12-03 09:51:01 -0500
+
+ 1. eliminate the "P" (parameter) macro;
+
+ 2. the "noncontroversial" changes circulated on the time zone
+ mailing list (less the changes to "logwtmp.c");
+
+ 3. eliminate "too many transition" errors when "min" is used in time
+ zone rules;
+
+ 4. changes by Paul Eggert (including updated information for Venezuela).
+
+
+Release data2007i - 2007-10-30 10:28:11 -0400
+
+ changes for Cuba and Syria
+
+
+Release 2007h - 2007-10-01 10:05:51 -0400
+
+ changes by Paul Eggert, as well as an updated link to the ICU
+ project in tz-link.htm
+
+
+Release 2007g - 2007-08-20 10:47:59 -0400
+
+ changes by Paul Eggert
+
+ The "leapseconds" file has been updated to incorporate the most
+ recent International Earth Rotation and Reference Systems Service
+ (IERS) bulletin.
+
+ There's an addition to tz-art.htm regarding the television show "Medium".
+
+
+Release 2007f - 2007-05-07 10:46:46 -0400
+
+ changes by Paul Eggert (including Haiti, Turks and Caicos, and New
+ Zealand)
+
+ changes to zic.c to allow hour values greater than 24 (along with
+ Paul's improved time value overflow checking)
+
+
+Release 2007e - 2007-04-02 10:11:52 -0400
+
+ Syria and Honduras changes by Paul Eggert
+
+ zic.c variable renaming changes by Arthur David Olson
+
+
+Release 2007d - 2007-03-20 08:48:30 -0400
+
+ changes by Paul Eggert
+
+ the elimination of white space at the ends of lines
+
+
+Release 2007c - 2007-02-26 09:09:37 -0500
+
+ changes by Paul Eggert
+
+
+Release 2007b - 2007-02-12 09:34:20 -0500
+
+ Paul Eggert's proposed change to the quotation handling logic in zic.c.
+
+ changes to the commentary in "leapseconds" reflecting the IERS
+ announcement that there is to be no positive leap second at the end
+ of June 2007.
+
+
+Release 2007a - 2007-01-08 12:28:29 -0500
+
+ changes by Paul Eggert
+
+ Derick Rethan's Asmara change
+
+ Oscar van Vlijmen's Easter Island local mean time change
+
+ symbolic link changes
+
+
+Release 2006p - 2006-11-27 08:54:27 -0500
+
+ changes by Paul Eggert
+
+
+Release 2006o - 2006-11-06 09:18:07 -0500
+
+ changes by Paul Eggert
+
+
+Release 2006n - 2006-10-10 11:32:06 -0400
+
+ changes by Paul Eggert
+
+
+Release 2006m - 2006-10-02 15:32:35 -0400
+
+ changes for Uruguay, Palestine, and Egypt by Paul Eggert
+
+ (minimalist) changes to zic.8 to clarify "until" information
+
+
+Release data2006l - 2006-09-18 12:58:11 -0400
+
+ Paul's best-effort work on this coming weekend's Egypt time change
+
+
+Release 2006k - 2006-08-28 12:19:09 -0400
+
+ changes by Paul Eggert
+
+
+Release 2006j - 2006-08-21 09:56:32 -0400
+
+ changes by Paul Eggert
+
+
+Release code2006i - 2006-08-07 12:30:55 -0400
+
+ localtime.c fixes
+
+ Ken Pizzini's conversion script
+
+
+Release code2006h - 2006-07-24 09:19:37 -0400
+
+ adds public domain notices to four files
+
+ includes a fix for transition times being off by a second
+
+ adds a new recording to the "arts" file (information courtesy Colin Bowern)
+
+
+Release 2006g - 2006-05-08 17:18:09 -0400
+
+ northamerica changes by Paul Eggert
+
+
+Release 2006f - 2006-05-01 11:46:00 -0400
+
+ a missing version number problem is fixed (with thanks to Bradley
+ White for catching the problem)
+
+
+Release 2006d - 2006-04-17 14:33:43 -0400
+
+ changes by Paul Eggert
+
+ added new items to tz-arts.htm that were found by Paul
+
+
+Release 2006c - 2006-04-03 10:09:32 -0400
+
+ two sets of data changes by Paul Eggert
+
+ a fencepost error fix in zic.c
+
+ changes to zic.c and the "europe" file to minimize differences
+ between output produced by the old 32-bit zic and the new 64-bit
+ version
+
+
+Release 2006b - 2006-02-20 10:08:18 -0500
+ [tz32code2006b + tz64code2006b + tzdata2006b]
+
+ 64-bit code
+
+ All SCCS IDs were bumped to "8.1" for this release.
+
+
+Release 2006a - 2006-01-30 08:59:31 -0500
+
+ changes by Paul Eggert (in particular, Indiana time zone moves)
+
+ an addition to the zic manual page to describe how special-case
+ transitions are handled
+
+
+Release 2005r - 2005-12-27 09:27:13 -0500
+
+ Canadian changes by Paul Eggert
+
+ They also add "<pre>" directives to time zone data files and reflect
+ changes to warning message logic in "zdump.c" (but with calls to
+ "gettext" kept unbundled at the suggestion of Ken Pizzini).
+
+
+Release 2005q - 2005-12-13 09:17:09 -0500
+
+ Nothing earth-shaking here:
+ 1. Electronic mail addresses have been removed.
+ 2. Casts of the return value of exit have been removed.
+ 3. Casts of the argument of is.* macros have been added.
+ 4. Indentation in one section of zic.c has been fixed.
+ 5. References to dead URLs in the data files have been dealt with.
+
+
+Release 2005p - 2005-12-05 10:30:53 -0500
+
+ "systemv", "tz-link.htm", and "zdump.c" changes
+ (less the casts of arguments to the is* macros)
+
+
+Release 2005o - 2005-11-28 10:55:26 -0500
+
+ Georgia, Cuba, Nicaragua, and Jordan changes by Paul Eggert
+
+ zdump.c lint fixes by Arthur David Olson
+
+
+Release 2005n - 2005-10-03 09:44:09 -0400
+
+ changes by Paul Eggert (both the Uruguay changes and the Kyrgyzstan
+ et al. changes)
+
+
+Release 2005m - 2005-08-29 12:15:40 -0400
+
+ changes by Paul Eggert (with a small tweak to the tz-art change)
+
+ a declaration of an unused variable has been removed from zdump.c
+
+
+Release 2005l - 2005-08-22 12:06:39 -0400
+
+ changes by Paul Eggert
+
+ overflow/underflow checks by Arthur David Olson, minus changes to
+ the "Theory" file about the pending addition of 64-bit data (I grow
+ less confident of the changes being accepted with each passing day,
+ and the changes no longer increase the data files nine-fold--there's
+ less than a doubling in size by my local Sun's reckoning)
+
+
+Release 2005k - 2005-07-14 14:14:24 -0400
+
+ The "leapseconds" file has been edited to reflect the recently
+ announced leap second at the end of 2005.
+
+ I've also deleted electronic mail addresses from the files as an
+ anti-spam measure.
+
+
+Release 2005j - 2005-06-13 14:34:13 -0400
+
+ These reflect changes to limit the length of time zone abbreviations
+ and the characters used in those abbreviations.
+
+ There are also changes to handle POSIX-style "quoted" time zone
+ environment variables.
+
+ The changes were circulated on the time zone mailing list; the only
+ change since then was the removal of a couple of minimum-length of
+ abbreviation checks.
+
+
+Release data2005i - 2005-04-21 15:04:16 -0400
+
+ changes (most importantly to Nicaragua and Haiti) by Paul Eggert
+
+
+Release 2005h - 2005-04-04 11:24:47 -0400
+
+ changes by Paul Eggert
+
+ minor changes to Makefile and zdump.c to produce more useful output
+ when doing a "make typecheck"
+
+
+Release 2005g - 2005-03-14 10:11:21 -0500
+
+ changes by Paul Eggert (a change to current DST rules in Uruguay and
+ an update to a link to time zone software)
+
+
+Release 2005f - 2005-03-01 08:45:32 -0500
+
+ data and documentation changes by Paul Eggert
+
+
+Release 2005e - 2005-02-10 15:59:44 -0500
+
+ [not summarized]
+
+
+Release code2005d - 2005-01-31 09:21:47 -0500
+
+ make zic complain about links to links if the -v flag is used
+
+ have "make public" do more code checking
+
+ add an include to "localtime.c" for the benefit of gcc systems
+
+
+Release 2005c - 2005-01-17 18:36:29 -0500
+
+ get better results when mktime runs on a system where time_t is double
+
+ changes to the data files (most importantly to Paraguay)
+
+
+Release 2005b - 2005-01-10 09:19:54 -0500
+
+ Get localtime and gmtime working on systems with exotic time_t types.
+
+ Update the leap second commentary in the "leapseconds" file.
+
+
+Release 2005a - 2005-01-01 13:13:44 -0500
+
+ [not summarized]
+
+
+Release code2004i - 2004-12-14 13:42:58 -0500
+
+ Deal with systems where time_t is unsigned.
+
+
+Release code2004h - 2004-12-07 11:40:18 -0500
+
+ 64-bit-time_t changes
+
+
+Release 2004g - 2004-11-02 09:06:01 -0500
+
+ update to Cuba (taking effect this weekend)
+
+ other changes by Paul Eggert
+
+ correction of the spelling of Oslo
+
+ changed versions of difftime.c and private.h
+
+
+Release code2004f - 2004-10-21 10:25:22 -0400
+
+ Cope with wide-ranging tm_year values.
+
+
+Release 2004e - 2004-10-11 14:47:21 -0400
+
+ Brazil/Argentina/Israel changes by Paul Eggert
+
+ changes to tz-link.htm by Paul
+
+ one small fix to Makefile
+
+
+Release 2004d - 2004-09-22 08:27:29 -0400
+
+ Avoid overflow problems when TM_YEAR_BASE is added to an integer.
+
+
+Release 2004c - 2004-08-11 12:06:26 -0400
+
+ asctime-related changes
+
+ (variants of) some of the documentation changes suggested by Paul Eggert
+
+
+Release 2004b - 2004-07-19 14:33:35 -0400
+
+ data changes by Paul Eggert - most importantly, updates for Argentina
+
+
+Release 2004a - 2004-05-27 12:00:47 -0400
+
+ changes by Paul Eggert
+
+ Handle DST transitions that occur at the end of a month in some
+ years but at the start of the following month in other years.
+
+ Add a copy of the correspondence that's the basis for claims about
+ DST in the Navajo Nation.
+
+
+Release 2003e - 2003-12-15 09:36:47 -0500
+
+ changes by Arthur David Olson (primarily code changes)
+
+ changes by Paul Eggert (primarily data changes)
+
+ minor changes to "Makefile" and "northamerica" (in the latter case,
+ optimization of the "Toronto" rules)
+
+
+Release 2003d - 2003-10-06 09:34:44 -0400
+
+ changes by Paul Eggert
+
+
+Release 2003c - 2003-09-16 10:47:05 -0400
+
+ Fix bad returns in zic.c's inleap function.
+ Thanks to Bradley White for catching the problem!
+
+
+Release 2003b - 2003-09-16 07:13:44 -0400
+
+ Add a "--version" option (and documentation) to the zic and zdump commands.
+
+ changes to overflow/underflow checking in zic
+
+ a localtime typo fix.
+
+ Update the leapseconds and tz-art.htm files.
+
+
+Release 2003a - 2003-03-24 09:30:54 -0500
+
+ changes by Paul Eggert
+
+ a few additions and modifications to the tz-art.htm file
+
+
+Release 2002d - 2002-10-15 13:12:42 -0400
+
+ changes by Paul Eggert, less the "Britain (UK)" change in iso3166.tab
+
+ There's also a new time zone quote in "tz-art.htm".
+
+
+Release 2002c - 2002-04-04 11:55:20 -0500
+
+ changes by Paul Eggert
+
+ Change zic.c to avoid creating symlinks to files that don't exist.
+
+
+Release 2002b - 2002-01-28 12:56:03 -0500
+
+ [These change notes are for Release 2002a, which was corrupted.
+ 2002b was a corrected version of 2002a.]
+
+ changes by Paul Eggert
+
+ Update the "leapseconds" file to note that there'll be no leap
+ second at the end of June, 2002.
+
+ Change "zic.c" to deal with a problem in handling the "Asia/Bishkek" zone.
+
+ Change to "difftime.c" to avoid sizeof problems.
+
+
+Release 2001d - 2001-10-09 13:31:32 -0400
+
+ changes by Paul Eggert
+
+
+Release 2001c - 2001-06-05 13:59:55 -0400
+
+ changes by Paul Eggert and Andrew Brown
+
+
+Release 2001b - 2001-04-05 16:44:38 -0400
+
+ changes by Paul Eggert (modulo jnorgard's typo fix)
+
+ tz-art.htm has been HTMLified.
+
+
+Release 2001a - 2001-03-13 12:57:44 -0500
+
+ changes by Paul Eggert
+
+ An addition to the "leapseconds" file: comments with the text of the
+ latest IERS leap second notice.
+
+ Trailing white space has been removed from data file lines, and
+ repeated spaces in "Rule Jordan" lines in the "asia" file have been
+ converted to tabs.
+
+
+Release 2000h - 2000-12-14 15:33:38 -0500
+
+ changes by Paul Eggert
+
+ one typo fix in the "art" file
+
+ With providence, this is the last update of the millennium.
+
+
+Release 2000g - 2000-10-10 11:35:22 -0400
+
+ changes by Paul Eggert
+
+ correction of John Mackin's name submitted by Robert Elz
+
+ Garry Shandling's Daylight Saving Time joke (!?!) from the recent
+ Emmy Awards broadcast.
+
+
+Release 2000f - 2000-08-10 09:31:58 -0400
+
+ changes by Paul Eggert
+
+ Added information in "tz-art.htm" on a Seinfeld reference to DST.
+
+ Error checking and messages in the "yearistype" script have been
+ improved.
+
+
+Release 2000e - 2000-07-31 09:27:54 -0400
+
+ data changes by Paul Eggert
+
+ a change to the default value of the defined constant HAVE_STRERROR
+
+ the addition of a Dave Barry quote on DST to the tz-arts file
+
+
+Release 2000d - 2000-04-20 15:43:04 -0400
+
+ changes to the documentation and code of strftime for C99 conformance
+
+ a bug fix for date.c
+
+ These are based on (though modified from) changes by Paul Eggert.
+
+
+Release 2000c - 2000-03-04 10:31:43 -0500
+
+ changes by Paul Eggert
+
+
+Release 2000b - 2000-02-21 12:16:29 -0500
+
+ changes by Paul Eggert and Joseph Myers
+
+ modest tweaks to the tz-art.htm and tz-link.htm files
+
+
+Release 2000a - 2000-01-18 09:21:26 -0500
+
+ changes by Paul Eggert
+
+ The two hypertext documents have also been renamed.
+
+
+Release code1999i-data1999j - 1999-11-15 18:43:22 -0500
+
+ Paul Eggert's changes
+
+ additions to the "zic" manual page and the "Arts.htm" file
+
+
+Release code1999h-data1999i - 1999-11-08 14:55:21 -0500
+
+ [not summarized]
+
+
+Release data1999h - 1999-10-07 03:50:29 -0400
+
+ changes by Paul Eggert to "europe" (most importantly, fixing
+ Lithuania and Estonia)
+
+
+Release 1999g - 1999-09-28 11:06:18 -0400
+
+ data changes by Paul Eggert (most importantly, the change for
+ Lebanon that buys correctness for this coming Sunday)
+
+ The "code" file contains changes to "Makefile" and "checktab.awk" to
+ allow better checking of time zone files before they are published.
+
+
+Release 1999f - 1999-09-23 09:48:14 -0400
+
+ changes by Arthur David Olson and Paul Eggert
+
+
+Release 1999e - 1999-08-17 15:20:54 -0400
+
+ changes circulated by Paul Eggert, although the change to handling
+ of DST-specifying time zone names has been commented out for now
+ (search for "XXX" in "localtime.c" for details). These files also
+ do not make any changes to the start of DST in Brazil.
+
+ In addition to Paul's changes, there are updates to "Arts.htm" and
+ cleanups of URLs.
+
+
+Release 1999d - 1999-03-30 11:31:07 -0500
+
+ changes by Paul Eggert
+
+ The Makefile's "make public" rule has also been changed to do a test
+ compile of each individual time zone data file (which should help
+ avoid problems such as the one we had with Nicosia).
+
+
+Release 1999c - 1999-03-25 09:47:47 -0500
+
+ changes by Paul Eggert, most importantly the change for Chile.
+
+
+Release 1999b - 1999-02-01 17:51:44 -0500
+
+ changes by Paul Eggert
+
+ code changes (suggested by Mani Varadarajan, mani at be.com) for
+ correct handling of symbolic links when building using a relative directory
+
+ code changes to generate correct messages for failed links
+
+ updates to the URLs in Arts.htm
+
+
+Release 1999a - 1999-01-19 16:20:29 -0500
+
+ error message internationalizations and corrections in zic.c and
+ zdump.c (as suggested by Vladimir Michl, vladimir.michl at upol.cz,
+ to whom thanks!)
+
+
+Release code1998h-data1998i - 1998-10-01 09:56:10 -0400
+
+ changes for Brazil, Chile, and Germany
+
+ support for use of "24:00" in the input files for the time zone compiler
+
+
+Release code1998g-data1998h - 1998-09-24 10:50:28 -0400
+
+ changes by Paul Eggert
+
+ correction to a define in the "private.h" file
+
+
+Release data1998g - 1998-08-11 03:28:35 -0000
+ [tzdata1998g.tar.gz is missing!]
+
+ Lithuanian change provided by mgedmin at pub.osf.it
+
+ Move creation of the GMT link with Etc/GMT to "etcetera" (from
+ "backward") to ensure that the GMT file is created even where folks
+ don't want the "backward" links (as suggested by Paul Eggert).
+
+
+Release data1998f - 1998-07-20 13:50:00 -0000
+ [tzdata1998f.tar.gz is missing!]
+
+ Update the "leapseconds" file to include the newly-announced
+ insertion at the end of 1998.
+
+
+Release code1998f - 1998-06-01 10:18:31 -0400
+
+ addition to localtime.c by Guy Harris
+
+
+Release 1998e - 1998-05-28 09:56:26 -0400
+
+ The Makefile is changed to produce zoneinfo-posix rather than
+ zoneinfo/posix, and to produce zoneinfo-leaps rather than
+ zoneinfo/right.
+
+ data changes by Paul Eggert
+
+ changes from Guy Harris to provide asctime_r and ctime_r
+
+ A usno1998 file (substantially identical to usno1997) has been added.
+
+
+Release 1998d - 1998-05-14 11:58:34 -0400
+
+ changes to comments (in particular, elimination of references to CIA maps).
+ "Arts.htm", "WWW.htm", "asia", and "australasia" are the only places
+ where changes occur.
+
+
+Release 1998c - 1998-02-28 12:32:26 -0500
+
+ changes by Paul Eggert (save the "French correction," on which I'll
+ wait for the dust to settle)
+
+ symlink changes
+
+ changes and additions to Arts.htm
+
+
+Release 1998b - 1998-01-17 14:31:51 -0500
+
+ URL cleanups and additions
+
+
+Release 1998a - 1998-01-13 12:37:35 -0500
+
+ changes by Paul Eggert
+
+
+Release code1997i-data1997k - 1997-12-29 09:53:41 -0500
+
+ changes by Paul Eggert, with minor modifications from Arthur David
+ Olson to make the files more browser friendly
+
+
+Release code1997h-data1997j - 1997-12-18 17:47:35 -0500
+
+ minor changes to put "TZif" at the start of each time zone information file
+
+ a rule has also been added to the Makefile so you can
+ make zones
+ to just recompile the zone information files (rather than doing a
+ full "make install" with its other effects).
+
+
+Release data1997i - 1997-10-07 08:45:38 -0400
+
+ changes to Africa by Paul Eggert
+
+
+Release code1997g-data1997h - 1997-09-04 16:56:54 -0400
+
+ corrections for Uruguay (and other locations)
+
+ Arthur David Olson's simple-minded fix allowing mktime to both
+ correctly handle leap seconds and correctly handle tm_sec values
+ upon which arithmetic has been performed.
+
+
+Release code1997f-data1997g - 1997-07-19 13:15:02 -0400
+
+ Paul Eggert's updates
+
+ a small change to a function prototype;
+
+ "Music" has been renamed "Arts.htm", HTMLified, and augmented to
+ include information on Around the World in Eighty Days.
+
+
+Release code1997e-data1997f - 1997-05-03 18:52:34 -0400
+
+ fixes to zic's error handling
+
+ changes inspired by the item circulated on Slovenia
+
+ The description of Web resources has been HTMLified for browsing
+ convenience.
+
+ A new piece of tz-related music has been added to the "Music" file.
+
+
+Release code1997d-data1997e - 1997-03-29 12:48:52 -0500
+
+ Paul Eggert's latest suggestions
+
+
+Release code1997c-data1997d - 1997-03-07 20:37:54 -0500
+
+ changes to "zic.c" to correct performance of the "-s" option
+
+ a new file "usno1997"
+
+
+Release data1997c - 1997-03-04 09:58:18 -0500
+
+ changes in Israel
+
+
+Release 1997b - 1997-02-27 18:34:19 -0500
+
+ The data file incorporates the 1997 leap second.
+
+ The code file incorporates Arthur David Olson's take on the
+ zic/multiprocessor/directory-creation situation.
+
+
+Release 1997a - 1997-01-21 09:11:10 -0500
+
+ Paul Eggert's Antarctica (and other changes)
+
+ Arthur David Olson finessed the "getopt" issue by checking against
+ both -1 and EOF (regardless of POSIX, SunOS 4.1.1's manual says -1
+ is returned while SunOS 5.5's manual says EOF is returned).
+
+
+Release code1996o-data1996n - 1996-12-27 21:42:05 -0500
+
+ Paul Eggert's latest changes
+
+
+Release code1996n - 1996-12-16 09:42:02 -0500
+
+ link snapping fix from Bruce Evans (via Garrett Wollman)
+
+
+Release data1996m - 1996-11-24 02:37:34 -0000
+ [tzdata1996m.tar.gz is missing!]
+
+ Paul Eggert's batch of changes
+
+
+Release code1996m-data1996l - 1996-11-05 14:00:12 -0500
+
+ No functional changes here; the files have simply been changed to
+ make more use of ISO style dates in comments. The names of the above
+ files now include the year in full.
+
+
+Release code96l - 1996-09-08 17:12:20 -0400
+
+ tzcode96k was missing a couple of pieces.
+
+
+Release 96k - 1996-09-08 16:06:22 -0400
+
+ the latest round of changes from Paul Eggert
+
+ the recent Year 2000 material
+
+
+Release code96j - 1996-07-30 13:18:53 -0400
+
+ Set sp->typecnt as suggested by Timothy Patrick Murphy.
+
+
+Release code96i - 1996-07-27 20:11:35 -0400
+
+ Paul's suggested patch for strftime %V week numbers
+
+
+Release data96i - 1996-07-01 18:13:04 -0400
+
+ "northamerica" and "europe" changes by Paul Eggert
+
+
+Release code96h - 1996-06-05 08:02:21 -0400
+
+ fix for handling transitions specified in Universal Time
+
+ Some "public domain" notices have also been added.
+
+
+Release code96g - 1996-05-16 14:00:26 -0400
+
+ fix for the simultaneous-DST-and-zone-change challenge
+
+
+Release data96h - 1996-05-09 17:40:51 -0400
+
+ changes by Paul Eggert
+
+
+Release code96f-data96g - 1996-05-03 03:09:59 -0000
+ [tzcode96f.tar.gz + tzdata96g.tar.gz are both missing!]
+
+ The changes get us some of the way to fixing the problems noted in Paul
+ Eggert's letter yesterday (in addition to a few others). The approach
+ has been to make zic a bit smarter about figuring out what time zone
+ abbreviations apply just after the time specified in the "UNTIL" part
+ of a zone line. Putting the smarts in zic means avoiding having
+ transition times show up in both "Zone" lines and "Rule" lines, which
+ in turn avoids multiple transition time entries in time zone files.
+ (This also makes the zic input files such as "europe" a bit shorter and
+ should ease maintenance.)
+
+
+Release data96f - 1996-04-19 19:20:03 -0000
+ [tzdata96f.tar.gz is missing!]
+
+ The only changes are to the "northamerica" file; the time zone
+ abbreviation for Denver is corrected to MST (and MDT), and the
+ comments for Mexico have been updated.
+
+
+Release data96e - 1996-03-19 17:37:26 -0500
+
+ Proposals by Paul Eggert, in particular the Portugal change that
+ comes into play at the end of this month.
+
+
+Release data96d - 1996-03-18 20:49:39 -0500
+
+ [not summarized]
+
+
+Release code96e - 1996-02-29 15:43:27 -0000
+ [tzcode96e.tar.gz is missing!]
+
+ internationalization changes and the fix to the documentation for strftime
+
+
+Release code96d-data96c - 1996-02-12 11:05:27 -0500
+
+ The "code" file simply updates Bob Kridle's electronic address.
+
+ The "data" file updates rules for Mexico.
+
+
+Release data96b - 1996-01-27 15:44:42 -0500
+
+ Kiribati change
+
+
+Release code96c - 1996-01-16 16:58:15 -0500
+
+ leap-year streamlining and binary-search changes
+
+ fix to newctime.3
+
+
+Release code96b - 1996-01-10 20:42:39 -0500
+
+ fixes and enhancements from Paul Eggert, including code that
+ emulates the behavior of recent versions of the SunOS "date"
+ command.
+
+
+Release 96a - 1996-01-06 09:08:24 -0500
+
+ Israel updates
+
+ fixes to strftime.c for correct ISO 8601 week number generation,
+ plus support for two new formats ('G' and 'g') to give ISO 8601 year
+ numbers (which are not necessarily the same as calendar year numbers)
+
+
+Release code95i-data95m - 1995-12-21 12:46:47 -0500
+
+ The latest revisions from Paul Eggert are included, the usno1995
+ file has been updated, and a new file ("WWW") covering useful URLs
+ has been added.
+
+
+Release code95h-data95l - 1995-12-19 18:10:12 -0500
+
+ A simplification of a macro definition, a change to data for Sudan,
+ and (for last minute shoppers) notes in the "Music" file on the CD
+ "Old Man Time".
+
+
+Release code95g-data95k - 1995-10-30 10:32:47 -0500
+
+ (slightly reformatted) 8-bit-clean proposed patch
+
+ minor patch: US/Eastern -> America/New_York
+
+ snapshot of the USNO's latest data ("usno1995")
+
+ some other minor cleanups
+
+
+Release code95f-data95j - 1995-10-28 21:01:34 -0000
+ [tzcode95f.tar.gz + tzdata95j.tar.gz are both missing!]
+
+ European cleanups
+
+ support for 64-bit time_t's
+
+ optimization in localtime.c
+
+
+Release code95e - 1995-10-13 13:23:57 -0400
+
+ the mktime change to scan from future to past when trying to find time zone
+ offsets
+
+
+Release data95i - 1995-09-26 10:43:26 -0400
+
+ For Canada/Central, guess that the Sun customer's "one week too
+ early" was just a approximation, and the true error is one month
+ too early. This is consistent with the rest of Canada.
+
+
+Release data95h - 1995-09-21 11:26:48 -0400
+
+ latest changes from Paul Eggert
+
+
+Release code95d - 1995-09-14 11:14:45 -0400
+
+ the addition of a "Music" file, which documents four recorded
+ versions of the tune "Save That Time".
+
+
+Release data95g - 1995-09-01 17:21:36 -0400
+
+ "yearistype" correction
+
+
+Release data95f - 1995-08-28 20:46:56 -0400
+
+ Paul Eggert's change to the australasia file
+
+
+Release data95e - 1995-07-08 18:02:34 -0400
+
+ The only change is a leap second at the end of this year.
+ Thanks to Bradley White for forwarding news on the leap second.
+
+
+Release data95d - 1995-07-03 13:26:22 -0400
+
+ Paul Eggert's changes
+
+
+Release data95c - 1995-07-02 19:19:28 -0400
+
+ changes to "asia", "backward", "europe", and "southamerica"
+ (read: northamericacentrics need not apply)
+
+
+Release code95c - 1995-03-13 14:00:46 -0500
+
+ one-line fix for sign extension problems in detzcode
+
+
+Release 95b - 1995-03-04 11:22:38 -0500
+
+ Minor changes in both:
+
+ The "code" file contains a workaround for the lack of "unistd.h" in
+ Microsoft C++ version 7.
+
+ The "data" file contains a fixed "Link" for America/Shiprock.
+
+
+Release 94h - 1994-12-10 12:51:14 -0500
+
+ The files:
+
+ * incorporate the changes to "zdump" and "date" to make changes to
+ the "TZ" environment variable permanent;
+
+ * incorporate the table changes by Paul Eggert;
+
+ * include (and document) support for universal time specifications in
+ data files - but do not (yet) include use of this feature in the
+ data files.
+
+ Think of this as "TZ Classic" - the software has been set up not to break if
+ universal time shows up in its input, and data entries have been
+ left as is so as not to break existing implementations.
+
+
+Release data94f - 1994-08-20 12:56:09 -0400
+
+ (with thanks!) the latest data updates from Paul Eggert
+
+
+Release data94e - 1994-06-04 13:13:53 -0400
+
+ [not summarized]
+
+
+Release code94g - 1994-05-05 12:14:07 -0400
+
+ fix missing "optind.c" and a reference to it in the Makefile
+
+
+Release code94f - 1994-05-05 13:00:33 -0000
+ [tzcode94f.tar.gz is missing!]
+
+ changes to avoid overflow in difftime, as well as changes to cope
+ with the 52/53 challenge in strftime
+
+
+Release code94e - 1994-03-30 23:32:59 -0500
+
+ change for the benefit of PCTS
+
+
+Release 94d - 1994-02-24 15:42:25 -0500
+
+ Avoid clashes with POSIX semantics for zones such as GMT+4.
+
+ Some other very minor housekeeping is also present.
+
+
+Release code94c - 1994-02-10 08:52:40 -0500
+
+ Fix bug where mkdirs was broken unless you compile with
+ -fwritable-strings (which is generally losing to do).
+
+
+Release 94b - 1994-02-07 10:04:33 -0500
+
+ work by Paul Eggert who notes:
+
+ I found another book of time zone histories by E W Whitman; it's not
+ as extensive as Shanks but has a few goodies of its own. I used it
+ to update the tables. I also fixed some more as a result of
+ correspondence with Adam David and Peter Ilieve, and move some stray
+ links from 'europe' to 'backward'. I corrected some scanning errors
+ in usno1989.
+
+ As far as the code goes, I fixed zic to allow years in the range
+ INT_MIN to INT_MAX; this fixed a few boundary conditions around 1900.
+ And I cleaned up the zic documentation a little bit.
+
+
+Release data94a - 1994-02-03 08:58:54 -0500
+
+ It simply incorporates the recently announced leap second into the
+ "leapseconds" file.
+
+
+Release 93g - 1993-11-22 17:28:27 -0500
+
+ Paul Eggert has provided a good deal of historic information (based
+ on Shanks), and there are some code changes to deal with the buglets
+ that crawled out in dealing with the new information.
+
+
+Release 93f - 1993-10-15 12:27:46 -0400
+
+ Paul Eggert's changes
+
+
+Release 93e - 1993-09-05 21:21:44 -0400
+
+ This has updated data for Israel, England, and Kwajalein. There's
+ also an update to "zdump" to cope with Kwajalein's 24-hour jump.
+ Thanks to Paul Eggert and Peter Ilieve for the changes.
+
+
+Release 93d - 1993-06-17 23:34:17 -0400
+
+ new fix and new data on Israel
+
+
+Release 93c - 1993-06-06 19:31:55 -0400
+
+ [not summarized]
+
+
+Release 93b - 1993-02-02 14:53:58 -0500
+
+ updated "leapseconds" file
+
+
+Release 93 - 1993-01-08 07:01:06 -0500
+
+ At kre's suggestion, the package has been split in two - a code piece
+ (which also includes documentation) that's only of use to folks who
+ want to recompile things and a data piece useful to anyone who can
+ run "zic".
+
+ The new version has a few changes to the data files, a few
+ portability changes, and an off-by-one fix (with thanks to
+ Tom Karzes at deshaw.com for providing a description and a
+ solution).
+
+
+Release 92c - 1992-11-21 17:35:36 -0000
+ [tz92c.tar.Z is missing!]
+
+ The fallout from the latest round of DST transitions.
+
+ There are changes for Portugal, Saskatchewan, and "Pacific-New";
+ there's also a change to "zic.c" that makes it portable to more systems.
+
+
+Release 92 - 1992-04-25 18:17:03 -0000
+ [tz92.tar.Z is missing!]
+
+ By popular demand (well, at any rate, following a request by kre at munnari)
+
+
+The 1989 update of the time zone package featured:
+
+ * POSIXization (including interpretation of POSIX-style TZ environment
+ variables, provided by Guy Harris),
+ * ANSIfication (including versions of "mktime" and "difftime"),
+ * SVIDulation (an "altzone" variable)
+ * MACHination (the "gtime" function)
+ * corrections to some time zone data (including corrections to the rules
+ for Great Britain and New Zealand)
+ * reference data from the United States Naval Observatory for folks who
+ want to do additional time zones
+ * and the 1989 data for Saudi Arabia.
+
+ (Since this code will be treated as "part of the implementation" in some
+ places and as "part of the application" in others, there's no good way to
+ name functions, such as timegm, that are not part of the proposed ANSI C
+ standard; such functions have kept their old, underscore-free names in this
+ update.)
+
+ And the "dysize" function has disappeared; it was present to allow
+ compilation of the "date" command on old BSD systems, and a version of "date"
+ is now provided in the package. The "date" command is not created when you
+ "make all" since it may lack options provided by the version distributed with
+ your operating system, or may not interact with the system in the same way
+ the native version does.
+
+ Since POSIX frowns on correct leap second handling, the default behavior of
+ the "zic" command (in the absence of a "-L" option) has been changed to omit
+ leap second information from its output files.
+
+
+-----
+Notes
+
+This file contains copies of the part of each release announcement
+that talks about the changes in that release. The text has been
+adapted and reformatted for the purposes of this file.
+
+Traditionally a release R consists of a pair of tarball files,
+tzcodeR.tar.gz and tzdataR.tar.gz. However, some releases (e.g.,
+code2010a, data2012c) consist of just one or the other tarball, and a
+few (e.g., code2012c-data2012d) have tarballs with mixed version
+numbers. Recent releases also come in an experimental format
+consisting of a single tarball tzdb-R.tar.lz with extra data.
+
+Release time stamps are taken from the release's commit (for newer,
+Git-based releases), from the newest file in the tarball (for older
+releases, where this info is available) or from the email announcing
+the release (if all else fails; these are marked with a time zone of
+-0000 and an "is missing!" comment).
+
+Earlier versions of the code and data were not announced on the tz
+list and are not summarized here.
+
+This file is in the public domain.
+
+Local Variables:
+coding: utf-8
+End:
diff --git a/README b/README
new file mode 100644
index 000000000000..8a09aa2cb9f1
--- /dev/null
+++ b/README
@@ -0,0 +1,71 @@
+README for the tz distribution
+
+"What time is it?" -- Richard Deacon as The King
+"Any time you want it to be." -- Frank Baxter as The Scientist
+ (from the Bell System film "About Time")
+
+The Time Zone Database (often called tz or zoneinfo) contains code and
+data that represent the history of local time for many representative
+locations around the globe. It is updated periodically to reflect
+changes made by political bodies to time zone boundaries, UTC offsets,
+and daylight-saving rules.
+
+Here is a recipe for acquiring, building, installing, and testing the
+tz distribution on a GNU/Linux or similar host.
+
+To acquire the distribution, run the following shell commands:
+
+ mkdir tz
+ cd tz
+ wget --retr-symlinks 'ftp://ftp.iana.org/tz/tz*-latest.tar.gz'
+ gzip -dc tzcode-latest.tar.gz | tar -xf -
+ gzip -dc tzdata-latest.tar.gz | tar -xf -
+
+Alternatively, the following shell commands acquire the same
+distribution, with extra data useful for regression testing:
+
+ wget --retr-symlinks 'ftp://ftp.iana.org/tz/tzdb-latest.tar.lz'
+ lzip -dc tzdb-latest.tar.lz | tar -xf -
+
+Be sure to read the comments in "Makefile" and make any changes needed
+to make things right for your system, especially if you are using some
+platform other than GNU/Linux. Then run the following commands,
+substituting your desired installation directory for "$HOME/tzdir":
+
+ make TOPDIR=$HOME/tzdir install
+ $HOME/tzdir/etc/zdump -v America/Los_Angeles
+
+Historical local time information has been included here to:
+
+* provide a compendium of data about the history of civil time
+ that is useful even if not 100% accurate;
+
+* give an idea of the variety of local time rules that have
+ existed in the past and thus an idea of the variety that may be
+ expected in the future;
+
+* provide a test of the generality of the local time rule description
+ system.
+
+The information in the time zone data files is by no means authoritative;
+fixes and enhancements are welcome. Please see the file CONTRIBUTING
+for details.
+
+Thanks to these Time Zone Caballeros who've made major contributions to the
+time conversion package: Keith Bostic; Bob Devine; Paul Eggert; Robert Elz;
+Guy Harris; Mark Horton; John Mackin; and Bradley White. Thanks also to
+Michael Bloom, Art Neilson, Stephen Prince, John Sovereign, and Frank Wales
+for testing work, and to Gwillim Law for checking local mean time data.
+Thanks in particular to Arthur David Olson, the project's founder and first
+maintainer, to whom the time zone community owes the greatest debt of all.
+None of them are responsible for remaining errors.
+
+Look in <ftp://ftp.iana.org/tz/releases/> for updated versions of these files.
+
+Please send comments or information to tz@iana.org.
+
+-----
+
+This file is in the public domain, so clarified as of 2009-05-17 by
+Arthur David Olson. The other files in this distribution are either
+public domain or BSD licensed; see the file LICENSE for details.
diff --git a/Theory b/Theory
new file mode 100644
index 000000000000..677baf6f8c72
--- /dev/null
+++ b/Theory
@@ -0,0 +1,840 @@
+Theory and pragmatics of the tz code and data
+
+
+----- Outline -----
+
+ Scope of the tz database
+ Names of time zone rules
+ Time zone abbreviations
+ Accuracy of the tz database
+ Time and date functions
+ Calendrical issues
+ Time and time zones on Mars
+
+
+----- Scope of the tz database -----
+
+The tz database attempts to record the history and predicted future of
+all computer-based clocks that track civil time. To represent this
+data, the world is partitioned into regions whose clocks all agree
+about time stamps that occur after the somewhat-arbitrary cutoff point
+of the POSIX Epoch (1970-01-01 00:00:00 UTC). For each such region,
+the database records all known clock transitions, and labels the region
+with a notable location. Although 1970 is a somewhat-arbitrary
+cutoff, there are significant challenges to moving the cutoff earlier
+even by a decade or two, due to the wide variety of local practices
+before computer timekeeping became prevalent.
+
+Clock transitions before 1970 are recorded for each such location,
+because most systems support time stamps before 1970 and could
+misbehave if data entries were omitted for pre-1970 transitions.
+However, the database is not designed for and does not suffice for
+applications requiring accurate handling of all past times everywhere,
+as it would take far too much effort and guesswork to record all
+details of pre-1970 civil timekeeping.
+
+As described below, reference source code for using the tz database is
+also available. The tz code is upwards compatible with POSIX, an
+international standard for UNIX-like systems. As of this writing, the
+current edition of POSIX is:
+
+ The Open Group Base Specifications Issue 7
+ IEEE Std 1003.1, 2013 Edition
+ <http://pubs.opengroup.org/onlinepubs/9699919799/>
+
+
+
+----- Names of time zone rules -----
+
+Each of the database's time zone rules has a unique name.
+Inexperienced users are not expected to select these names unaided.
+Distributors should provide documentation and/or a simple selection
+interface that explains the names; for one example, see the 'tzselect'
+program in the tz code. The Unicode Common Locale Data Repository
+<http://cldr.unicode.org/> contains data that may be useful for other
+selection interfaces.
+
+The time zone rule naming conventions attempt to strike a balance
+among the following goals:
+
+ * Uniquely identify every region where clocks have agreed since 1970.
+ This is essential for the intended use: static clocks keeping local
+ civil time.
+
+ * Indicate to experts where that region is.
+
+ * Be robust in the presence of political changes. For example, names
+ of countries are ordinarily not used, to avoid incompatibilities
+ when countries change their name (e.g. Zaire->Congo) or when
+ locations change countries (e.g. Hong Kong from UK colony to
+ China).
+
+ * Be portable to a wide variety of implementations.
+
+ * Use a consistent naming conventions over the entire world.
+
+Names normally have the form AREA/LOCATION, where AREA is the name
+of a continent or ocean, and LOCATION is the name of a specific
+location within that region. North and South America share the same
+area, 'America'. Typical names are 'Africa/Cairo', 'America/New_York',
+and 'Pacific/Honolulu'.
+
+Here are the general rules used for choosing location names,
+in decreasing order of importance:
+
+ Use only valid POSIX file name components (i.e., the parts of
+ names other than '/'). Do not use the file name
+ components '.' and '..'. Within a file name component,
+ use only ASCII letters, '.', '-' and '_'. Do not use
+ digits, as that might create an ambiguity with POSIX
+ TZ strings. A file name component must not exceed 14
+ characters or start with '-'. E.g., prefer 'Brunei'
+ to 'Bandar_Seri_Begawan'. Exceptions: see the discussion
+ of legacy names below.
+ A name must not be empty, or contain '//', or start or end with '/'.
+ Do not use names that differ only in case. Although the reference
+ implementation is case-sensitive, some other implementations
+ are not, and they would mishandle names differing only in case.
+ If one name A is an initial prefix of another name AB (ignoring case),
+ then B must not start with '/', as a regular file cannot have
+ the same name as a directory in POSIX. For example,
+ 'America/New_York' precludes 'America/New_York/Bronx'.
+ Uninhabited regions like the North Pole and Bouvet Island
+ do not need locations, since local time is not defined there.
+ There should typically be at least one name for each ISO 3166-1
+ officially assigned two-letter code for an inhabited country
+ or territory.
+ If all the clocks in a region have agreed since 1970,
+ don't bother to include more than one location
+ even if subregions' clocks disagreed before 1970.
+ Otherwise these tables would become annoyingly large.
+ If a name is ambiguous, use a less ambiguous alternative;
+ e.g. many cities are named San José and Georgetown, so
+ prefer 'Costa_Rica' to 'San_Jose' and 'Guyana' to 'Georgetown'.
+ Keep locations compact. Use cities or small islands, not countries
+ or regions, so that any future time zone changes do not split
+ locations into different time zones. E.g. prefer 'Paris'
+ to 'France', since France has had multiple time zones.
+ Use mainstream English spelling, e.g. prefer 'Rome' to 'Roma', and
+ prefer 'Athens' to the Greek 'Αθήνα' or the Romanized 'Athína'.
+ The POSIX file name restrictions encourage this rule.
+ Use the most populous among locations in a zone,
+ e.g. prefer 'Shanghai' to 'Beijing'. Among locations with
+ similar populations, pick the best-known location,
+ e.g. prefer 'Rome' to 'Milan'.
+ Use the singular form, e.g. prefer 'Canary' to 'Canaries'.
+ Omit common suffixes like '_Islands' and '_City', unless that
+ would lead to ambiguity. E.g. prefer 'Cayman' to
+ 'Cayman_Islands' and 'Guatemala' to 'Guatemala_City',
+ but prefer 'Mexico_City' to 'Mexico' because the country
+ of Mexico has several time zones.
+ Use '_' to represent a space.
+ Omit '.' from abbreviations in names, e.g. prefer 'St_Helena'
+ to 'St._Helena'.
+ Do not change established names if they only marginally
+ violate the above rules. For example, don't change
+ the existing name 'Rome' to 'Milan' merely because
+ Milan's population has grown to be somewhat greater
+ than Rome's.
+ If a name is changed, put its old spelling in the 'backward' file.
+ This means old spellings will continue to work.
+
+The file 'zone1970.tab' lists geographical locations used to name time
+zone rules. It is intended to be an exhaustive list of names for
+geographic regions as described above; this is a subset of the names
+in the data. Although a 'zone1970.tab' location's longitude
+corresponds to its LMT offset with one hour for every 15 degrees east
+longitude, this relationship is not exact.
+
+Older versions of this package used a different naming scheme,
+and these older names are still supported.
+See the file 'backward' for most of these older names
+(e.g., 'US/Eastern' instead of 'America/New_York').
+The other old-fashioned names still supported are
+'WET', 'CET', 'MET', and 'EET' (see the file 'europe').
+
+Older versions of this package defined legacy names that are
+incompatible with the first rule of location names, but which are
+still supported. These legacy names are mostly defined in the file
+'etcetera'. Also, the file 'backward' defines the legacy names
+'GMT0', 'GMT-0', 'GMT+0' and 'Canada/East-Saskatchewan', and the file
+'northamerica' defines the legacy names 'EST5EDT', 'CST6CDT',
+'MST7MDT', and 'PST8PDT'.
+
+Excluding 'backward' should not affect the other data. If
+'backward' is excluded, excluding 'etcetera' should not affect the
+remaining data.
+
+
+----- Time zone abbreviations -----
+
+When this package is installed, it generates time zone abbreviations
+like 'EST' to be compatible with human tradition and POSIX.
+Here are the general rules used for choosing time zone abbreviations,
+in decreasing order of importance:
+
+ Use three or more characters that are ASCII alphanumerics or '+' or '-'.
+ Previous editions of this database also used characters like
+ ' ' and '?', but these characters have a special meaning to
+ the shell and cause commands like
+ set `date`
+ to have unexpected effects.
+ Previous editions of this rule required upper-case letters,
+ but the Congressman who introduced Chamorro Standard Time
+ preferred "ChST", so lower-case letters are now allowed.
+ Also, POSIX from 2001 on relaxed the rule to allow '-', '+',
+ and alphanumeric characters from the portable character set
+ in the current locale. In practice ASCII alphanumerics and
+ '+' and '-' are safe in all locales.
+
+ In other words, in the C locale the POSIX extended regular
+ expression [-+[:alnum:]]{3,} should match the abbreviation.
+ This guarantees that all abbreviations could have been
+ specified by a POSIX TZ string.
+
+ Use abbreviations that are in common use among English-speakers,
+ e.g. 'EST' for Eastern Standard Time in North America.
+ We assume that applications translate them to other languages
+ as part of the normal localization process; for example,
+ a French application might translate 'EST' to 'HNE'.
+
+ For zones whose times are taken from a city's longitude, use the
+ traditional xMT notation, e.g. 'PMT' for Paris Mean Time.
+ The only name like this in current use is 'GMT'.
+
+ Use 'LMT' for local mean time of locations before the introduction
+ of standard time; see "Scope of the tz database".
+
+ If there is no common English abbreviation, use numeric offsets like
+ -05 and +0830 that are generated by zic's %z notation.
+
+ [The remaining guidelines predate the introduction of %z.
+ They are problematic as they mean tz data entries invent
+ notation rather than record it. These guidelines are now
+ deprecated and the plan is to gradually move to %z for
+ inhabited locations and to "-00" for uninhabited locations.]
+
+ If there is no common English abbreviation, abbreviate the English
+ translation of the usual phrase used by native speakers.
+ If this is not available or is a phrase mentioning the country
+ (e.g. "Cape Verde Time"), then:
+
+ When a country is identified with a single or principal zone,
+ append 'T' to the country's ISO code, e.g. 'CVT' for
+ Cape Verde Time. For summer time append 'ST';
+ for double summer time append 'DST'; etc.
+ Otherwise, take the first three letters of an English place
+ name identifying each zone and append 'T', 'ST', etc.
+ as before; e.g. 'VLAST' for VLAdivostok Summer Time.
+
+ Use UT (with time zone abbreviation '-00') for locations while
+ uninhabited. The leading '-' is a flag that the time
+ zone is in some sense undefined; this notation is
+ derived from Internet RFC 3339.
+
+Application writers should note that these abbreviations are ambiguous
+in practice: e.g. 'CST' has a different meaning in China than
+it does in the United States. In new applications, it's often better
+to use numeric UT offsets like '-0600' instead of time zone
+abbreviations like 'CST'; this avoids the ambiguity.
+
+
+----- Accuracy of the tz database -----
+
+The tz database is not authoritative, and it surely has errors.
+Corrections are welcome and encouraged; see the file CONTRIBUTING.
+Users requiring authoritative data should consult national standards
+bodies and the references cited in the database's comments.
+
+Errors in the tz database arise from many sources:
+
+ * The tz database predicts future time stamps, and current predictions
+ will be incorrect after future governments change the rules.
+ For example, if today someone schedules a meeting for 13:00 next
+ October 1, Casablanca time, and tomorrow Morocco changes its
+ daylight saving rules, software can mess up after the rule change
+ if it blithely relies on conversions made before the change.
+
+ * The pre-1970 entries in this database cover only a tiny sliver of how
+ clocks actually behaved; the vast majority of the necessary
+ information was lost or never recorded. Thousands more zones would
+ be needed if the tz database's scope were extended to cover even
+ just the known or guessed history of standard time; for example,
+ the current single entry for France would need to split into dozens
+ of entries, perhaps hundreds. And in most of the world even this
+ approach would be misleading due to widespread disagreement or
+ indifference about what times should be observed. In her 2015 book
+ "The Global Transformation of Time, 1870-1950", Vanessa Ogle writes
+ "Outside of Europe and North America there was no system of time
+ zones at all, often not even a stable landscape of mean times,
+ prior to the middle decades of the twentieth century". See:
+ Timothy Shenk, Booked: A Global History of Time. Dissent 2015-12-17
+ https://www.dissentmagazine.org/blog/booked-a-global-history-of-time-vanessa-ogle
+
+ * Most of the pre-1970 data entries come from unreliable sources, often
+ astrology books that lack citations and whose compilers evidently
+ invented entries when the true facts were unknown, without
+ reporting which entries were known and which were invented.
+ These books often contradict each other or give implausible entries,
+ and on the rare occasions when they are checked they are
+ typically found to be incorrect.
+
+ * For the UK the tz database relies on years of first-class work done by
+ Joseph Myers and others; see <http://www.polyomino.org.uk/british-time/>.
+ Other countries are not done nearly as well.
+
+ * Sometimes, different people in the same city would maintain clocks
+ that differed significantly. Railway time was used by railroad
+ companies (which did not always agree with each other),
+ church-clock time was used for birth certificates, etc.
+ Often this was merely common practice, but sometimes it was set by law.
+ For example, from 1891 to 1911 the UT offset in France was legally
+ 0:09:21 outside train stations and 0:04:21 inside.
+
+ * Although a named location in the tz database stands for the
+ containing region, its pre-1970 data entries are often accurate for
+ only a small subset of that region. For example, Europe/London
+ stands for the United Kingdom, but its pre-1847 times are valid
+ only for locations that have London's exact meridian, and its 1847
+ transition to GMT is known to be valid only for the L&NW and the
+ Caledonian railways.
+
+ * The tz database does not record the earliest time for which a zone's
+ data entries are thereafter valid for every location in the region.
+ For example, Europe/London is valid for all locations in its
+ region after GMT was made the standard time, but the date of
+ standardization (1880-08-02) is not in the tz database, other than
+ in commentary. For many zones the earliest time of validity is
+ unknown.
+
+ * The tz database does not record a region's boundaries, and in many
+ cases the boundaries are not known. For example, the zone
+ America/Kentucky/Louisville represents a region around the city of
+ Louisville, the boundaries of which are unclear.
+
+ * Changes that are modeled as instantaneous transitions in the tz
+ database were often spread out over hours, days, or even decades.
+
+ * Even if the time is specified by law, locations sometimes
+ deliberately flout the law.
+
+ * Early timekeeping practices, even assuming perfect clocks, were
+ often not specified to the accuracy that the tz database requires.
+
+ * Sometimes historical timekeeping was specified more precisely
+ than what the tz database can handle. For example, from 1909 to
+ 1937 Netherlands clocks were legally UT +00:19:32.13, but the tz
+ database cannot represent the fractional second.
+
+ * Even when all the timestamp transitions recorded by the tz database
+ are correct, the tz rules that generate them may not faithfully
+ reflect the historical rules. For example, from 1922 until World
+ War II the UK moved clocks forward the day following the third
+ Saturday in April unless that was Easter, in which case it moved
+ clocks forward the previous Sunday. Because the tz database has no
+ way to specify Easter, these exceptional years are entered as
+ separate tz Rule lines, even though the legal rules did not change.
+
+ * The tz database models pre-standard time using the proleptic Gregorian
+ calendar and local mean time (LMT), but many people used other
+ calendars and other timescales. For example, the Roman Empire used
+ the Julian calendar, and had 12 varying-length daytime hours with a
+ non-hour-based system at night.
+
+ * Early clocks were less reliable, and data entries do not represent
+ this unreliability.
+
+ * As for leap seconds, civil time was not based on atomic time before
+ 1972, and we don't know the history of earth's rotation accurately
+ enough to map SI seconds to historical solar time to more than
+ about one-hour accuracy. See: Morrison LV, Stephenson FR.
+ Historical values of the Earth's clock error Delta T and the
+ calculation of eclipses. J Hist Astron. 2004;35:327-36
+ <http://adsabs.harvard.edu/full/2004JHA....35..327M>;
+ Historical values of the Earth's clock error. J Hist Astron. 2005;36:339
+ <http://adsabs.harvard.edu/full/2005JHA....36..339M>.
+
+ * The relationship between POSIX time (that is, UTC but ignoring leap
+ seconds) and UTC is not agreed upon after 1972. Although the POSIX
+ clock officially stops during an inserted leap second, at least one
+ proposed standard has it jumping back a second instead; and in
+ practice POSIX clocks more typically either progress glacially during
+ a leap second, or are slightly slowed while near a leap second.
+
+ * The tz database does not represent how uncertain its information is.
+ Ideally it would contain information about when data entries are
+ incomplete or dicey. Partial temporal knowledge is a field of
+ active research, though, and it's not clear how to apply it here.
+
+In short, many, perhaps most, of the tz database's pre-1970 and future
+time stamps are either wrong or misleading. Any attempt to pass the
+tz database off as the definition of time should be unacceptable to
+anybody who cares about the facts. In particular, the tz database's
+LMT offsets should not be considered meaningful, and should not prompt
+creation of zones merely because two locations differ in LMT or
+transitioned to standard time at different dates.
+
+
+----- Time and date functions -----
+
+The tz code contains time and date functions that are upwards
+compatible with those of POSIX.
+
+POSIX has the following properties and limitations.
+
+* In POSIX, time display in a process is controlled by the
+ environment variable TZ. Unfortunately, the POSIX TZ string takes
+ a form that is hard to describe and is error-prone in practice.
+ Also, POSIX TZ strings can't deal with other (for example, Israeli)
+ daylight saving time rules, or situations where more than two
+ time zone abbreviations are used in an area.
+
+ The POSIX TZ string takes the following form:
+
+ stdoffset[dst[offset][,date[/time],date[/time]]]
+
+ where:
+
+ std and dst
+ are 3 or more characters specifying the standard
+ and daylight saving time (DST) zone names.
+ Starting with POSIX.1-2001, std and dst may also be
+ in a quoted form like "<UTC+10>"; this allows
+ "+" and "-" in the names.
+ offset
+ is of the form '[+-]hh:[mm[:ss]]' and specifies the
+ offset west of UT. 'hh' may be a single digit; 0<=hh<=24.
+ The default DST offset is one hour ahead of standard time.
+ date[/time],date[/time]
+ specifies the beginning and end of DST. If this is absent,
+ the system supplies its own rules for DST, and these can
+ differ from year to year; typically US DST rules are used.
+ time
+ takes the form 'hh:[mm[:ss]]' and defaults to 02:00.
+ This is the same format as the offset, except that a
+ leading '+' or '-' is not allowed.
+ date
+ takes one of the following forms:
+ Jn (1<=n<=365)
+ origin-1 day number not counting February 29
+ n (0<=n<=365)
+ origin-0 day number counting February 29 if present
+ Mm.n.d (0[Sunday]<=d<=6[Saturday], 1<=n<=5, 1<=m<=12)
+ for the dth day of week n of month m of the year,
+ where week 1 is the first week in which day d appears,
+ and '5' stands for the last week in which day d appears
+ (which may be either the 4th or 5th week).
+ Typically, this is the only useful form;
+ the n and Jn forms are rarely used.
+
+ Here is an example POSIX TZ string, for US Pacific time using rules
+ appropriate from 1987 through 2006:
+
+ TZ='PST8PDT,M4.1.0/02:00,M10.5.0/02:00'
+
+ This POSIX TZ string is hard to remember, and mishandles time stamps
+ before 1987 and after 2006. With this package you can use this
+ instead:
+
+ TZ='America/Los_Angeles'
+
+* POSIX does not define the exact meaning of TZ values like "EST5EDT".
+ Typically the current US DST rules are used to interpret such values,
+ but this means that the US DST rules are compiled into each program
+ that does time conversion. This means that when US time conversion
+ rules change (as in the United States in 1987), all programs that
+ do time conversion must be recompiled to ensure proper results.
+
+* The TZ environment variable is process-global, which makes it hard
+ to write efficient, thread-safe applications that need access
+ to multiple time zones.
+
+* In POSIX, there's no tamper-proof way for a process to learn the
+ system's best idea of local wall clock. (This is important for
+ applications that an administrator wants used only at certain times -
+ without regard to whether the user has fiddled the "TZ" environment
+ variable. While an administrator can "do everything in UTC" to get
+ around the problem, doing so is inconvenient and precludes handling
+ daylight saving time shifts - as might be required to limit phone
+ calls to off-peak hours.)
+
+* POSIX provides no convenient and efficient way to determine the UT
+ offset and time zone abbreviation of arbitrary time stamps,
+ particularly for time zone settings that do not fit into the
+ POSIX model.
+
+* POSIX requires that systems ignore leap seconds.
+
+* The tz code attempts to support all the time_t implementations
+ allowed by POSIX. The time_t type represents a nonnegative count of
+ seconds since 1970-01-01 00:00:00 UTC, ignoring leap seconds.
+ In practice, time_t is usually a signed 64- or 32-bit integer; 32-bit
+ signed time_t values stop working after 2038-01-19 03:14:07 UTC, so
+ new implementations these days typically use a signed 64-bit integer.
+ Unsigned 32-bit integers are used on one or two platforms,
+ and 36-bit and 40-bit integers are also used occasionally.
+ Although earlier POSIX versions allowed time_t to be a
+ floating-point type, this was not supported by any practical
+ systems, and POSIX.1-2013 and the tz code both require time_t
+ to be an integer type.
+
+These are the extensions that have been made to the POSIX functions:
+
+* The "TZ" environment variable is used in generating the name of a file
+ from which time zone information is read (or is interpreted a la
+ POSIX); "TZ" is no longer constrained to be a three-letter time zone
+ name followed by a number of hours and an optional three-letter
+ daylight time zone name. The daylight saving time rules to be used
+ for a particular time zone are encoded in the time zone file;
+ the format of the file allows U.S., Australian, and other rules to be
+ encoded, and allows for situations where more than two time zone
+ abbreviations are used.
+
+ It was recognized that allowing the "TZ" environment variable to
+ take on values such as "America/New_York" might cause "old" programs
+ (that expect "TZ" to have a certain form) to operate incorrectly;
+ consideration was given to using some other environment variable
+ (for example, "TIMEZONE") to hold the string used to generate the
+ time zone information file name. In the end, however, it was decided
+ to continue using "TZ": it is widely used for time zone purposes;
+ separately maintaining both "TZ" and "TIMEZONE" seemed a nuisance;
+ and systems where "new" forms of "TZ" might cause problems can simply
+ use TZ values such as "EST5EDT" which can be used both by
+ "new" programs (a la POSIX) and "old" programs (as zone names and
+ offsets).
+
+* The code supports platforms with a UT offset member in struct tm,
+ e.g., tm_gmtoff.
+
+* The code supports platforms with a time zone abbreviation member in
+ struct tm, e.g., tm_zone.
+
+* Since the "TZ" environment variable can now be used to control time
+ conversion, the "daylight" and "timezone" variables are no longer
+ needed. (These variables are defined and set by "tzset"; however, their
+ values will not be used by "localtime.")
+
+* Functions tzalloc, tzfree, localtime_rz, and mktime_z for
+ more-efficient thread-safe applications that need to use
+ multiple time zones. The tzalloc and tzfree functions
+ allocate and free objects of type timezone_t, and localtime_rz
+ and mktime_z are like localtime_r and mktime with an extra
+ timezone_t argument. The functions were inspired by NetBSD.
+
+* A function "tzsetwall" has been added to arrange for the system's
+ best approximation to local wall clock time to be delivered by
+ subsequent calls to "localtime." Source code for portable
+ applications that "must" run on local wall clock time should call
+ "tzsetwall();" if such code is moved to "old" systems that don't
+ provide tzsetwall, you won't be able to generate an executable program.
+ (These time zone functions also arrange for local wall clock time to be
+ used if tzset is called - directly or indirectly - and there's no "TZ"
+ environment variable; portable applications should not, however, rely
+ on this behavior since it's not the way SVR2 systems behave.)
+
+* Negative time_t values are supported, on systems where time_t is signed.
+
+* These functions can account for leap seconds, thanks to Bradley White.
+
+Points of interest to folks with other systems:
+
+* Code compatible with this package is already part of many platforms,
+ including GNU/Linux, Android, the BSDs, Chromium OS, Cygwin, AIX, iOS,
+ BlackBery 10, macOS, Microsoft Windows, OpenVMS, and Solaris.
+ On such hosts, the primary use of this package
+ is to update obsolete time zone rule tables.
+ To do this, you may need to compile the time zone compiler
+ 'zic' supplied with this package instead of using the system 'zic',
+ since the format of zic's input is occasionally extended,
+ and a platform may still be shipping an older zic.
+
+* The UNIX Version 7 "timezone" function is not present in this package;
+ it's impossible to reliably map timezone's arguments (a "minutes west
+ of GMT" value and a "daylight saving time in effect" flag) to a
+ time zone abbreviation, and we refuse to guess.
+ Programs that in the past used the timezone function may now examine
+ tzname[localtime(&clock)->tm_isdst] to learn the correct time
+ zone abbreviation to use. Alternatively, use
+ localtime(&clock)->tm_zone if this has been enabled.
+
+* The 4.2BSD gettimeofday function is not used in this package.
+ This formerly let users obtain the current UTC offset and DST flag,
+ but this functionality was removed in later versions of BSD.
+
+* In SVR2, time conversion fails for near-minimum or near-maximum
+ time_t values when doing conversions for places that don't use UT.
+ This package takes care to do these conversions correctly.
+ A comment in the source code tells how to get compatibly wrong
+ results.
+
+The functions that are conditionally compiled if STD_INSPIRED is defined
+should, at this point, be looked on primarily as food for thought. They are
+not in any sense "standard compatible" - some are not, in fact, specified in
+*any* standard. They do, however, represent responses of various authors to
+standardization proposals.
+
+Other time conversion proposals, in particular the one developed by folks at
+Hewlett Packard, offer a wider selection of functions that provide capabilities
+beyond those provided here. The absence of such functions from this package
+is not meant to discourage the development, standardization, or use of such
+functions. Rather, their absence reflects the decision to make this package
+contain valid extensions to POSIX, to ensure its broad acceptability. If
+more powerful time conversion functions can be standardized, so much the
+better.
+
+
+----- Interface stability -----
+
+The tz code and data supply the following interfaces:
+
+ * A set of zone names as per "Names of time zone rules" above.
+
+ * Library functions described in "Time and date functions" above.
+
+ * The programs tzselect, zdump, and zic, documented in their man pages.
+
+ * The format of zic input files, documented in the zic man page.
+
+ * The format of zic output files, documented in the tzfile man page.
+
+ * The format of zone table files, documented in zone1970.tab.
+
+ * The format of the country code file, documented in iso3166.tab.
+
+When these interfaces are changed, an effort is made to preserve
+backward compatibility. For example, tz data files typically do not
+rely on recently-added zic features, so that users can run older zic
+versions to process newer data files.
+
+Interfaces not listed above are less stable. For example, users
+should not rely on particular UT offsets or abbreviations for time
+stamps, as data entries are often based on guesswork and these guesses
+may be corrected or improved.
+
+
+----- Calendrical issues -----
+
+Calendrical issues are a bit out of scope for a time zone database,
+but they indicate the sort of problems that we would run into if we
+extended the time zone database further into the past. An excellent
+resource in this area is Nachum Dershowitz and Edward M. Reingold,
+Calendrical Calculations: Third Edition, Cambridge University Press (2008)
+<http://emr.cs.iit.edu/home/reingold/calendar-book/third-edition/>.
+Other information and sources are given below. They sometimes disagree.
+
+
+France
+
+Gregorian calendar adopted 1582-12-20.
+French Revolutionary calendar used 1793-11-24 through 1805-12-31,
+and (in Paris only) 1871-05-06 through 1871-05-23.
+
+
+Russia
+
+From Chris Carrier (1996-12-02):
+On 1929-10-01 the Soviet Union instituted an "Eternal Calendar"
+with 30-day months plus 5 holidays, with a 5-day week.
+On 1931-12-01 it changed to a 6-day week; in 1934 it reverted to the
+Gregorian calendar while retaining the 6-day week; on 1940-06-27 it
+reverted to the 7-day week. With the 6-day week the usual days
+off were the 6th, 12th, 18th, 24th and 30th of the month.
+(Source: Evitiar Zerubavel, _The Seven Day Circle_)
+
+
+Mark Brader reported a similar story in "The Book of Calendars", edited
+by Frank Parise (1982, Facts on File, ISBN 0-8719-6467-8), page 377. But:
+
+From: Petteri Sulonen (via Usenet)
+Date: 14 Jan 1999 00:00:00 GMT
+...
+
+If your source is correct, how come documents between 1929 and 1940 were
+still dated using the conventional, Gregorian calendar?
+
+I can post a scan of a document dated December 1, 1934, signed by
+Yenukidze, the secretary, on behalf of Kalinin, the President of the
+Executive Committee of the Supreme Soviet, if you like.
+
+
+
+Sweden (and Finland)
+
+From: Mark Brader
+Subject: Re: Gregorian reform - a part of locale?
+<news:1996Jul6.012937.29190@sq.com>
+Date: 1996-07-06
+
+In 1700, Denmark made the transition from Julian to Gregorian. Sweden
+decided to *start* a transition in 1700 as well, but rather than have one of
+those unsightly calendar gaps :-), they simply decreed that the next leap
+year after 1696 would be in 1744 - putting the whole country on a calendar
+different from both Julian and Gregorian for a period of 40 years.
+
+However, in 1704 something went wrong and the plan was not carried through;
+they did, after all, have a leap year that year. And one in 1708. In 1712
+they gave it up and went back to Julian, putting 30 days in February that
+year!...
+
+Then in 1753, Sweden made the transition to Gregorian in the usual manner,
+getting there only 13 years behind the original schedule.
+
+(A previous posting of this story was challenged, and Swedish readers
+produced the following references to support it: "Tideräkning och historia"
+by Natanael Beckman (1924) and "Tid, en bok om tideräkning och
+kalenderväsen" by Lars-Olof Lodén (1968).
+
+
+Grotefend's data
+
+From: "Michael Palmer" [with one obvious typo fixed]
+Subject: Re: Gregorian Calendar (was Re: Another FHC related question
+Newsgroups: soc.genealogy.german
+Date: Tue, 9 Feb 1999 02:32:48 -800
+...
+
+The following is a(n incomplete) listing, arranged chronologically, of
+European states, with the date they converted from the Julian to the
+Gregorian calendar:
+
+04/15 Oct 1582 - Italy (with exceptions), Spain, Portugal, Poland (Roman
+ Catholics and Danzig only)
+09/20 Dec 1582 - France, Lorraine
+
+21 Dec 1582/
+ 01 Jan 1583 - Holland, Brabant, Flanders, Hennegau
+10/21 Feb 1583 - bishopric of Liege (Lüttich)
+13/24 Feb 1583 - bishopric of Augsburg
+04/15 Oct 1583 - electorate of Trier
+05/16 Oct 1583 - Bavaria, bishoprics of Freising, Eichstedt, Regensburg,
+ Salzburg, Brixen
+13/24 Oct 1583 - Austrian Oberelsaß and Breisgau
+20/31 Oct 1583 - bishopric of Basel
+02/13 Nov 1583 - duchy of Jülich-Berg
+02/13 Nov 1583 - electorate and city of Köln
+04/15 Nov 1583 - bishopric of Würzburg
+11/22 Nov 1583 - electorate of Mainz
+16/27 Nov 1583 - bishopric of Strassburg and the margraviate of Baden
+17/28 Nov 1583 - bishopric of Münster and duchy of Cleve
+14/25 Dec 1583 - Steiermark
+
+06/17 Jan 1584 - Austria and Bohemia
+11/22 Jan 1584 - Lucerne, Uri, Schwyz, Zug, Freiburg, Solothurn
+12/23 Jan 1584 - Silesia and the Lausitz
+22 Jan/
+ 02 Feb 1584 - Hungary (legally on 21 Oct 1587)
+ Jun 1584 - Unterwalden
+01/12 Jul 1584 - duchy of Westfalen
+
+16/27 Jun 1585 - bishopric of Paderborn
+
+14/25 Dec 1590 - Transylvania
+
+22 Aug/
+ 02 Sep 1612 - duchy of Prussia
+
+13/24 Dec 1614 - Pfalz-Neuburg
+
+ 1617 - duchy of Kurland (reverted to the Julian calendar in
+ 1796)
+
+ 1624 - bishopric of Osnabrück
+
+ 1630 - bishopric of Minden
+
+15/26 Mar 1631 - bishopric of Hildesheim
+
+ 1655 - Kanton Wallis
+
+05/16 Feb 1682 - city of Strassburg
+
+18 Feb/
+ 01 Mar 1700 - Protestant Germany (including Swedish possessions in
+ Germany), Denmark, Norway
+30 Jun/
+ 12 Jul 1700 - Gelderland, Zutphen
+10 Nov/
+ 12 Dec 1700 - Utrecht, Overijssel
+
+31 Dec 1700/
+ 12 Jan 1701 - Friesland, Groningen, Zürich, Bern, Basel, Geneva,
+ Turgau, and Schaffhausen
+
+ 1724 - Glarus, Appenzell, and the city of St. Gallen
+
+01 Jan 1750 - Pisa and Florence
+
+02/14 Sep 1752 - Great Britain
+
+17 Feb/
+ 01 Mar 1753 - Sweden
+
+1760-1812 - Graubünden
+
+The Russian empire (including Finland and the Baltic states) did not
+convert to the Gregorian calendar until the Soviet revolution of 1917.
+
+Source: H. Grotefend, _Taschenbuch der Zeitrechnung des deutschen
+Mittelalters und der Neuzeit_, herausgegeben von Dr. O. Grotefend
+(Hannover: Hahnsche Buchhandlung, 1941), pp. 26-28.
+
+
+----- Time and time zones on Mars -----
+
+Some people's work schedules use Mars time. Jet Propulsion Laboratory
+(JPL) coordinators have kept Mars time on and off at least since 1997
+for the Mars Pathfinder mission. Some of their family members have
+also adapted to Mars time. Dozens of special Mars watches were built
+for JPL workers who kept Mars time during the Mars Exploration
+Rovers mission (2004). These timepieces look like normal Seikos and
+Citizens but use Mars seconds rather than terrestrial seconds.
+
+A Mars solar day is called a "sol" and has a mean period equal to
+about 24 hours 39 minutes 35.244 seconds in terrestrial time. It is
+divided into a conventional 24-hour clock, so each Mars second equals
+about 1.02749125 terrestrial seconds.
+
+The prime meridian of Mars goes through the center of the crater
+Airy-0, named in honor of the British astronomer who built the
+Greenwich telescope that defines Earth's prime meridian. Mean solar
+time on the Mars prime meridian is called Mars Coordinated Time (MTC).
+
+Each landed mission on Mars has adopted a different reference for
+solar time keeping, so there is no real standard for Mars time zones.
+For example, the Mars Exploration Rover project (2004) defined two
+time zones "Local Solar Time A" and "Local Solar Time B" for its two
+missions, each zone designed so that its time equals local true solar
+time at approximately the middle of the nominal mission. Such a "time
+zone" is not particularly suited for any application other than the
+mission itself.
+
+Many calendars have been proposed for Mars, but none have achieved
+wide acceptance. Astronomers often use Mars Sol Date (MSD) which is a
+sequential count of Mars solar days elapsed since about 1873-12-29
+12:00 GMT.
+
+The tz database does not currently support Mars time, but it is
+documented here in the hopes that support will be added eventually.
+
+Sources:
+
+Michael Allison and Robert Schmunk,
+"Technical Notes on Mars Solar Time as Adopted by the Mars24 Sunclock"
+<http://www.giss.nasa.gov/tools/mars24/help/notes.html> (2012-08-08).
+
+Jia-Rui Chong, "Workdays Fit for a Martian", Los Angeles Times
+<http://articles.latimes.com/2004/jan/14/science/sci-marstime14>
+(2004-01-14), pp A1, A20-A21.
+
+Tom Chmielewski, "Jet Lag Is Worse on Mars", The Atlantic (2015-02-26)
+<http://www.theatlantic.com/technology/archive/2015/02/jet-lag-is-worse-on-mars/386033/>
+
+-----
+
+This file is in the public domain, so clarified as of 2009-05-17 by
+Arthur David Olson.
+
+-----
+Local Variables:
+coding: utf-8
+End:
diff --git a/antarctica b/antarctica
index 0995835752c1..6da1aef87f17 100644
--- a/antarctica
+++ b/antarctica
@@ -64,13 +64,18 @@
# Background:
# http://www.timeanddate.com/news/time/antartica-time-changes-2010.html
+# From Steffen Thorsen (2016-10-28):
+# Australian Antarctica Division informed us that Casey changed time
+# zone to UTC+11 in "the morning of 22nd October 2016".
+
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Antarctica/Casey 0 - -00 1969
8:00 - +08 2009 Oct 18 2:00
11:00 - +11 2010 Mar 5 2:00
8:00 - +08 2011 Oct 28 2:00
11:00 - +11 2012 Feb 21 17:00u
- 8:00 - +08
+ 8:00 - +08 2016 Oct 22
+ 11:00 - +11
Zone Antarctica/Davis 0 - -00 1957 Jan 13
7:00 - +07 1964 Nov
0 - -00 1969 Feb
diff --git a/asia b/asia
index b2c993085319..67164b3d8930 100644
--- a/asia
+++ b/asia
@@ -771,9 +771,19 @@ Zone Asia/Macau 7:34:20 - LMT 1912 Jan 1
###############################################################################
# Cyprus
-#
+
# Milne says the Eastern Telegraph Company used 2:14:00. Stick with LMT.
+# IATA SSIM (1998-09) has Cyprus using EU rules for the first time.
+
+# From Paul Eggert (2016-09-09):
+# Yesterday's Cyprus Mail reports that Northern Cyprus followed Turkey's
+# lead and switched from +02/+03 to +03 year-round.
+# http://cyprus-mail.com/2016/09/08/two-time-zones-cyprus-turkey-will-not-turn-clocks-back-next-month/
#
+# From Even Scharning (2016-10-31):
+# Looks like the time zone split in Cyprus went through last night.
+# http://cyprus-mail.com/2016/10/30/cyprus-new-division-two-time-zones-now-reality/
+
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Cyprus 1975 only - Apr 13 0:00 1:00 S
Rule Cyprus 1975 only - Oct 12 0:00 0 -
@@ -788,7 +798,10 @@ Rule Cyprus 1981 1998 - Mar lastSun 0:00 1:00 S
Zone Asia/Nicosia 2:13:28 - LMT 1921 Nov 14
2:00 Cyprus EE%sT 1998 Sep
2:00 EUAsia EE%sT
-# IATA SSIM (1998-09) has Cyprus using EU rules for the first time.
+Zone Asia/Famagusta 2:15:48 - LMT 1921 Nov 14
+ 2:00 Cyprus EE%sT 1998 Sep
+ 2:00 EUAsia EE%sT 2016 Sep 8
+ 3:00 - +03
# Classically, Cyprus belongs to Asia; e.g. see Herodotus, Histories, I.72.
# However, for various reasons many users expect to find it under Europe.
diff --git a/australasia b/australasia
index 85d363295b88..0bca53e2ee3f 100644
--- a/australasia
+++ b/australasia
@@ -702,11 +702,13 @@ Rule Tonga 1999 only - Oct 7 2:00s 1:00 S
Rule Tonga 2000 only - Mar 19 2:00s 0 -
Rule Tonga 2000 2001 - Nov Sun>=1 2:00 1:00 S
Rule Tonga 2001 2002 - Jan lastSun 2:00 0 -
+Rule Tonga 2016 max - Nov Sun>=1 2:00 1:00 S
+Rule Tonga 2017 max - Jan Sun>=15 3:00 0 -
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Pacific/Tongatapu 12:19:20 - LMT 1901
- 12:20 - TOT 1941 # Tonga Time
- 13:00 - TOT 1999
- 13:00 Tonga TO%sT
+ 12:20 - +1220 1941
+ 13:00 - +13 1999
+ 13:00 Tonga +13/+14
# Tuvalu
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
@@ -1712,9 +1714,17 @@ Zone Pacific/Wallis 12:15:20 - LMT 1901
# of January the standard time in the Kingdom shall be moved backward by one
# hour to 1:00am.
-# From Pulu 'Anau (2002-11-05):
+# From Pulu ʻAnau (2002-11-05):
# The law was for 3 years, supposedly to get renewed. It wasn't.
+# From Pulu ʻAnau (2016-10-27):
+# http://mic.gov.to/news-today/press-releases/6375-daylight-saving-set-to-run-from-6-november-2016-to-15-january-2017
+# Cannot find anyone who knows the rules, has seen the duration or has seen
+# the cabinet decision, but it appears we are following Fiji's rule set.
+#
+# From Tim Parenti (2016-10-26):
+# Assume Tonga will observe DST from the first Sunday in November at 02:00
+# through the third Sunday in January at 03:00, like Fiji, for now.
# Wake
diff --git a/backzone b/backzone
new file mode 100644
index 000000000000..4a5085f42295
--- /dev/null
+++ b/backzone
@@ -0,0 +1,677 @@
+# Zones that go back beyond the scope of the tz database
+
+# This file is in the public domain.
+
+# This file is by no means authoritative; if you think you know
+# better, go ahead and edit it (and please send any changes to
+# tz@iana.org for general use in the future). For more, please see
+# the file CONTRIBUTING in the tz distribution.
+
+
+# From Paul Eggert (2014-10-31):
+
+# This file contains data outside the normal scope of the tz database,
+# in that its zones do not differ from normal tz zones after 1970.
+# Links in this file point to zones in this file, superseding links in
+# the file 'backward'.
+
+# Although zones in this file may be of some use for analyzing
+# pre-1970 time stamps, they are less reliable, cover only a tiny
+# sliver of the pre-1970 era, and cannot feasibly be improved to cover
+# most of the era. Because the zones are out of normal scope for the
+# database, less effort is put into maintaining this file. Many of
+# the zones were formerly in other source files, but were removed or
+# replaced by links as their data entries were questionable and/or they
+# differed from other zones only in pre-1970 time stamps.
+
+# Unless otherwise specified, the source for data through 1990 is:
+# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
+# San Diego: ACS Publications, Inc. (2003).
+# Unfortunately this book contains many errors and cites no sources.
+
+# This file is not intended to be compiled standalone, as it
+# assumes rules from other files. In the tz distribution, use
+# 'make PACKRATDATA=backzone zones' to compile and install this file.
+
+# Zones are sorted by zone name. Each zone is preceded by the
+# name of the country that the zone is in, along with any other
+# commentary and rules associated with the entry.
+#
+# As explained in the zic man page, the zone columns are:
+# Zone NAME GMTOFF RULES FORMAT [UNTIL]
+
+# Ethiopia
+# From Paul Eggert (2014-07-31):
+# Like the Swahili of Kenya and Tanzania, many Ethiopians keep a
+# 12-hour clock starting at our 06:00, so their "8 o'clock" is our
+# 02:00 or 14:00. Keep this in mind when you ask the time in Amharic.
+#
+# Shanks & Pottenger write that Ethiopia had six narrowly-spaced time
+# zones between 1870 and 1890, that they merged to 38E50 (2:35:20) in
+# 1890, and that they switched to 3:00 on 1936-05-05. Perhaps 38E50
+# was for Adis Dera. Quite likely the Shanks data entries are wrong
+# anyway.
+Zone Africa/Addis_Ababa 2:34:48 - LMT 1870
+ 2:35:20 - ADMT 1936 May 5 # Adis Dera MT
+ 3:00 - EAT
+
+# Eritrea
+Zone Africa/Asmara 2:35:32 - LMT 1870
+ 2:35:32 - AMT 1890 # Asmara Mean Time
+ 2:35:20 - ADMT 1936 May 5 # Adis Dera MT
+ 3:00 - EAT
+Link Africa/Asmara Africa/Asmera
+
+# Mali (southern)
+Zone Africa/Bamako -0:32:00 - LMT 1912
+ 0:00 - GMT 1934 Feb 26
+ -1:00 - WAT 1960 Jun 20
+ 0:00 - GMT
+
+# Central African Republic
+Zone Africa/Bangui 1:14:20 - LMT 1912
+ 1:00 - WAT
+
+# Gambia
+Zone Africa/Banjul -1:06:36 - LMT 1912
+ -1:06:36 - BMT 1935 # Banjul Mean Time
+ -1:00 - WAT 1964
+ 0:00 - GMT
+
+# Malawi
+Zone Africa/Blantyre 2:20:00 - LMT 1903 Mar
+ 2:00 - CAT
+
+# Republic of the Congo
+Zone Africa/Brazzaville 1:01:08 - LMT 1912
+ 1:00 - WAT
+
+# Burundi
+Zone Africa/Bujumbura 1:57:28 - LMT 1890
+ 2:00 - CAT
+
+# Guinea
+Zone Africa/Conakry -0:54:52 - LMT 1912
+ 0:00 - GMT 1934 Feb 26
+ -1:00 - WAT 1960
+ 0:00 - GMT
+
+# Senegal
+Zone Africa/Dakar -1:09:44 - LMT 1912
+ -1:00 - WAT 1941 Jun
+ 0:00 - GMT
+
+# Tanzania
+Zone Africa/Dar_es_Salaam 2:37:08 - LMT 1931
+ 3:00 - EAT 1948
+ 2:45 - BEAUT 1961
+ 3:00 - EAT
+
+# Djibouti
+Zone Africa/Djibouti 2:52:36 - LMT 1911 Jul
+ 3:00 - EAT
+
+# Cameroon
+# Whitman says they switched to 1:00 in 1920; go with Shanks & Pottenger.
+Zone Africa/Douala 0:38:48 - LMT 1912
+ 1:00 - WAT
+# Sierra Leone
+# From Paul Eggert (2014-08-12):
+# The following table is from Shanks & Pottenger, but it can't be right.
+# Whitman gives Mar 31 - Aug 31 for 1931 on.
+# The International Hydrographic Bulletin, 1932-33, p 63 says that
+# Sierra Leone would advance its clocks by 20 minutes on 1933-10-01.
+# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
+Rule SL 1935 1942 - Jun 1 0:00 0:40 SLST
+Rule SL 1935 1942 - Oct 1 0:00 0 WAT
+Rule SL 1957 1962 - Jun 1 0:00 1:00 SLST
+Rule SL 1957 1962 - Sep 1 0:00 0 GMT
+Zone Africa/Freetown -0:53:00 - LMT 1882
+ -0:53:00 - FMT 1913 Jun # Freetown Mean Time
+ -1:00 SL %s 1957
+ 0:00 SL %s
+
+# Botswana
+# From Paul Eggert (2013-02-21):
+# Milne says they were regulated by the Cape Town Signal in 1899;
+# assume they switched to 2:00 when Cape Town did.
+Zone Africa/Gaborone 1:43:40 - LMT 1885
+ 1:30 - SAST 1903 Mar
+ 2:00 - CAT 1943 Sep 19 2:00
+ 2:00 1:00 CAST 1944 Mar 19 2:00
+ 2:00 - CAT
+
+# Zimbabwe
+Zone Africa/Harare 2:04:12 - LMT 1903 Mar
+ 2:00 - CAT
+
+# South Sudan
+Zone Africa/Juba 2:06:24 - LMT 1931
+ 2:00 Sudan CA%sT 2000 Jan 15 12:00
+ 3:00 - EAT
+
+# Uganda
+Zone Africa/Kampala 2:09:40 - LMT 1928 Jul
+ 3:00 - EAT 1930
+ 2:30 - BEAT 1948
+ 2:45 - BEAUT 1957
+ 3:00 - EAT
+
+# Rwanda
+Zone Africa/Kigali 2:00:16 - LMT 1935 Jun
+ 2:00 - CAT
+
+# Democratic Republic of the Congo (west)
+Zone Africa/Kinshasa 1:01:12 - LMT 1897 Nov 9
+ 1:00 - WAT
+
+# Gabon
+Zone Africa/Libreville 0:37:48 - LMT 1912
+ 1:00 - WAT
+
+# Togo
+Zone Africa/Lome 0:04:52 - LMT 1893
+ 0:00 - GMT
+
+# Angola
+#
+# Shanks gives 1911-05-26 for the transition to WAT,
+# evidently confusing the date of the Portuguese decree
+# http://dre.pt/pdf1sdip/1911/05/12500/23132313.pdf
+# with the date that it took effect, namely 1912-01-01.
+#
+Zone Africa/Luanda 0:52:56 - LMT 1892
+ 0:52:04 - AOT 1912 Jan 1 # Angola Time
+ 1:00 - WAT
+
+# Democratic Republic of the Congo (east)
+Zone Africa/Lubumbashi 1:49:52 - LMT 1897 Nov 9
+ 2:00 - CAT
+
+# Zambia
+Zone Africa/Lusaka 1:53:08 - LMT 1903 Mar
+ 2:00 - CAT
+
+# Equatorial Guinea
+#
+# Although Shanks says that Malabo switched from UT +00 to +01 on 1963-12-15,
+# a Google Books search says that London Calling, Issues 432-465 (1948), p 19,
+# says that Spanish Guinea was at +01 back then. The Shanks data entries
+# are most likely wrong, but we have nothing better; use them here for now.
+#
+Zone Africa/Malabo 0:35:08 - LMT 1912
+ 0:00 - GMT 1963 Dec 15
+ 1:00 - WAT
+
+# Lesotho
+Zone Africa/Maseru 1:50:00 - LMT 1903 Mar
+ 2:00 - SAST 1943 Sep 19 2:00
+ 2:00 1:00 SAST 1944 Mar 19 2:00
+ 2:00 - SAST
+
+# Swaziland
+Zone Africa/Mbabane 2:04:24 - LMT 1903 Mar
+ 2:00 - SAST
+
+# Somalia
+Zone Africa/Mogadishu 3:01:28 - LMT 1893 Nov
+ 3:00 - EAT 1931
+ 2:30 - BEAT 1957
+ 3:00 - EAT
+
+# Niger
+Zone Africa/Niamey 0:08:28 - LMT 1912
+ -1:00 - WAT 1934 Feb 26
+ 0:00 - GMT 1960
+ 1:00 - WAT
+
+# Mauritania
+Zone Africa/Nouakchott -1:03:48 - LMT 1912
+ 0:00 - GMT 1934 Feb 26
+ -1:00 - WAT 1960 Nov 28
+ 0:00 - GMT
+
+# Burkina Faso
+Zone Africa/Ouagadougou -0:06:04 - LMT 1912
+ 0:00 - GMT
+
+# Benin
+# Whitman says they switched to 1:00 in 1946, not 1934;
+# go with Shanks & Pottenger.
+Zone Africa/Porto-Novo 0:10:28 - LMT 1912 Jan 1
+ 0:00 - GMT 1934 Feb 26
+ 1:00 - WAT
+
+# São Tomé and Príncipe
+Zone Africa/Sao_Tome 0:26:56 - LMT 1884
+ -0:36:32 - LMT 1912 # Lisbon Mean Time
+ 0:00 - GMT
+
+# Mali (northern)
+Zone Africa/Timbuktu -0:12:04 - LMT 1912
+ 0:00 - GMT
+
+# Anguilla
+Zone America/Anguilla -4:12:16 - LMT 1912 Mar 2
+ -4:00 - AST
+
+# Antigua and Barbuda
+Zone America/Antigua -4:07:12 - LMT 1912 Mar 2
+ -5:00 - EST 1951
+ -4:00 - AST
+
+# Chubut, Argentina
+# The name "Comodoro Rivadavia" exceeds the 14-byte POSIX limit.
+Zone America/Argentina/ComodRivadavia -4:30:00 - LMT 1894 Oct 31
+ -4:16:48 - CMT 1920 May
+ -4:00 - ART 1930 Dec
+ -4:00 Arg AR%sT 1969 Oct 5
+ -3:00 Arg AR%sT 1991 Mar 3
+ -4:00 - WART 1991 Oct 20
+ -3:00 Arg AR%sT 1999 Oct 3
+ -4:00 Arg AR%sT 2000 Mar 3
+ -3:00 - ART 2004 Jun 1
+ -4:00 - WART 2004 Jun 20
+ -3:00 - ART
+
+# Aruba
+Zone America/Aruba -4:40:24 - LMT 1912 Feb 12 # Oranjestad
+ -4:30 - ANT 1965 # Netherlands Antilles Time
+ -4:00 - AST
+
+# Cayman Is
+Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown
+ -5:07:11 - KMT 1912 Feb # Kingston Mean Time
+ -5:00 - EST
+
+# Canada
+Zone America/Coral_Harbour -5:32:40 - LMT 1884
+ -5:00 NT_YK E%sT 1946
+ -5:00 - EST
+
+# Dominica
+Zone America/Dominica -4:05:36 - LMT 1911 Jul 1 0:01 # Roseau
+ -4:00 - AST
+
+# Baja California
+# See 'northamerica' for why this entry is here rather than there.
+Zone America/Ensenada -7:46:28 - LMT 1922 Jan 1 0:13:32
+ -8:00 - PST 1927 Jun 10 23:00
+ -7:00 - MST 1930 Nov 16
+ -8:00 - PST 1942 Apr
+ -7:00 - MST 1949 Jan 14
+ -8:00 - PST 1996
+ -8:00 Mexico P%sT
+
+# Grenada
+Zone America/Grenada -4:07:00 - LMT 1911 Jul # St George's
+ -4:00 - AST
+
+# Guadeloupe
+Zone America/Guadeloupe -4:06:08 - LMT 1911 Jun 8 # Pointe-à-Pitre
+ -4:00 - AST
+
+# Canada
+#
+# From Paul Eggert (2015-03-24):
+# Since 1970 most of Quebec has been like Toronto; see
+# America/Toronto. However, earlier versions of the tz database
+# mistakenly relied on data from Shanks & Pottenger saying that Quebec
+# differed from Ontario after 1970, and the following rules and zone
+# were created for most of Quebec from the incorrect Shanks &
+# Pottenger data. The post-1970 entries have been corrected, but the
+# pre-1970 entries are unchecked and probably have errors.
+#
+# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
+Rule Mont 1917 only - Mar 25 2:00 1:00 D
+Rule Mont 1917 only - Apr 24 0:00 0 S
+Rule Mont 1919 only - Mar 31 2:30 1:00 D
+Rule Mont 1919 only - Oct 25 2:30 0 S
+Rule Mont 1920 only - May 2 2:30 1:00 D
+Rule Mont 1920 1922 - Oct Sun>=1 2:30 0 S
+Rule Mont 1921 only - May 1 2:00 1:00 D
+Rule Mont 1922 only - Apr 30 2:00 1:00 D
+Rule Mont 1924 only - May 17 2:00 1:00 D
+Rule Mont 1924 1926 - Sep lastSun 2:30 0 S
+Rule Mont 1925 1926 - May Sun>=1 2:00 1:00 D
+Rule Mont 1927 1937 - Apr lastSat 24:00 1:00 D
+Rule Mont 1927 1937 - Sep lastSat 24:00 0 S
+Rule Mont 1938 1940 - Apr lastSun 0:00 1:00 D
+Rule Mont 1938 1939 - Sep lastSun 0:00 0 S
+Rule Mont 1946 1973 - Apr lastSun 2:00 1:00 D
+Rule Mont 1945 1948 - Sep lastSun 2:00 0 S
+Rule Mont 1949 1950 - Oct lastSun 2:00 0 S
+Rule Mont 1951 1956 - Sep lastSun 2:00 0 S
+Rule Mont 1957 1973 - Oct lastSun 2:00 0 S
+Zone America/Montreal -4:54:16 - LMT 1884
+ -5:00 Mont E%sT 1918
+ -5:00 Canada E%sT 1919
+ -5:00 Mont E%sT 1942 Feb 9 2:00s
+ -5:00 Canada E%sT 1946
+ -5:00 Mont E%sT 1974
+ -5:00 Canada E%sT
+
+# Montserrat
+# From Paul Eggert (2006-03-22):
+# In 1995 volcanic eruptions forced evacuation of Plymouth, the capital.
+# world.gazetteer.com says Cork Hill is the most populous location now.
+Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Cork Hill
+ -4:00 - AST
+
+# Argentina
+# This entry was intended for the following areas, but has been superseded by
+# more detailed zones.
+# Santa Fe (SF), Entre Ríos (ER), Corrientes (CN), Misiones (MN), Chaco (CC),
+# Formosa (FM), La Pampa (LP), Chubut (CH)
+Zone America/Rosario -4:02:40 - LMT 1894 Nov
+ -4:16:44 - CMT 1920 May
+ -4:00 - ART 1930 Dec
+ -4:00 Arg AR%sT 1969 Oct 5
+ -3:00 Arg AR%sT 1991 Jul
+ -3:00 - ART 1999 Oct 3 0:00
+ -4:00 Arg AR%sT 2000 Mar 3 0:00
+ -3:00 - ART
+
+# St Kitts-Nevis
+Zone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre
+ -4:00 - AST
+
+# St Lucia
+Zone America/St_Lucia -4:04:00 - LMT 1890 # Castries
+ -4:04:00 - CMT 1912 # Castries Mean Time
+ -4:00 - AST
+
+# Virgin Is
+Zone America/St_Thomas -4:19:44 - LMT 1911 Jul # Charlotte Amalie
+ -4:00 - AST
+
+# St Vincent and the Grenadines
+Zone America/St_Vincent -4:04:56 - LMT 1890 # Kingstown
+ -4:04:56 - KMT 1912 # Kingstown Mean Time
+ -4:00 - AST
+
+# British Virgin Is
+Zone America/Tortola -4:18:28 - LMT 1911 Jul # Road Town
+ -4:00 - AST
+
+# McMurdo, Ross Island, since 1955-12
+Zone Antarctica/McMurdo 0 - -00 1956
+ 12:00 NZ NZ%sT
+Link Antarctica/McMurdo Antarctica/South_Pole
+
+# Yemen
+# Milne says 2:59:54 was the meridian of the saluting battery at Aden,
+# and that Yemen was at 1:55:56, the meridian of the Hagia Sophia.
+Zone Asia/Aden 2:59:54 - LMT 1950
+ 3:00 - AST
+
+# Bahrain
+Zone Asia/Bahrain 3:22:20 - LMT 1920 # Manamah
+ 4:00 - GST 1972 Jun
+ 3:00 - AST
+
+# India
+#
+# From Paul Eggert (2014-09-06):
+# The 1876 Report of the Secretary of the [US] Navy, p 305 says that Madras
+# civil time was 5:20:57.3.
+#
+# From Paul Eggert (2014-08-21):
+# In tomorrow's The Hindu, Nitya Menon reports that India had two civil time
+# zones starting in 1884, one in Bombay and one in Calcutta, and that railways
+# used a third time zone based on Madras time (80 deg. 18'30" E). Also,
+# in 1881 Bombay briefly switched to Madras time, but switched back. See:
+# http://www.thehindu.com/news/cities/chennai/madras-375-when-madras-clocked-the-time/article6339393.ece
+#Zone Asia/Chennai [not enough info to complete]
+
+# China
+# Long-shu Time (probably due to Long and Shu being two names of that area)
+# Guangxi, Guizhou, Hainan, Ningxia, Sichuan, Shaanxi, and Yunnan;
+# most of Gansu; west Inner Mongolia; west Qinghai; and the Guangdong
+# counties Deqing, Enping, Kaiping, Luoding, Taishan, Xinxing,
+# Yangchun, Yangjiang, Yu'nan, and Yunfu.
+Zone Asia/Chongqing 7:06:20 - LMT 1928 # or Chungking
+ 7:00 - LONT 1980 May # Long-shu Time
+ 8:00 PRC C%sT
+Link Asia/Chongqing Asia/Chungking
+
+# Vietnam
+# From Paul Eggert (2014-10-13):
+# See Asia/Ho_Chi_Minh for the source for this data.
+# Trần's book says the 1954-55 transition to 07:00 in Hanoi was in
+# October 1954, with exact date and time unspecified.
+Zone Asia/Hanoi 7:03:24 - LMT 1906 Jul 1
+ 7:06:30 - PLMT 1911 May 1
+ 7:00 - ICT 1942 Dec 31 23:00
+ 8:00 - IDT 1945 Mar 14 23:00
+ 9:00 - JST 1945 Sep 2
+ 7:00 - ICT 1947 Apr 1
+ 8:00 - IDT 1954 Oct
+ 7:00 - ICT
+
+# China
+# Changbai Time ("Long-white Time", Long-white = Heilongjiang area)
+# Heilongjiang (except Mohe county), Jilin
+Zone Asia/Harbin 8:26:44 - LMT 1928 # or Haerbin
+ 8:30 - CHAT 1932 Mar # Changbai Time
+ 8:00 - CST 1940
+ 9:00 - CHAT 1966 May
+ 8:30 - CHAT 1980 May
+ 8:00 PRC C%sT
+
+# far west China
+Zone Asia/Kashgar 5:03:56 - LMT 1928 # or Kashi or Kaxgar
+ 5:30 - KAST 1940 # Kashgar Time
+ 5:00 - KAST 1980 May
+ 8:00 PRC C%sT
+
+# Kuwait
+Zone Asia/Kuwait 3:11:56 - LMT 1950
+ 3:00 - AST
+
+
+# Oman
+# Milne says 3:54:24 was the meridian of the Muscat Tidal Observatory.
+Zone Asia/Muscat 3:54:24 - LMT 1920
+ 4:00 - GST
+
+# India
+# From Paul Eggert (2014-08-11), after a heads-up from Stephen Colebourne:
+# According to a Portuguese decree (1911-05-26)
+# http://dre.pt/pdf1sdip/1911/05/12500/23132313.pdf
+# Portuguese India switched to UT +05 on 1912-01-01.
+#Zone Asia/Panaji [not enough info to complete]
+
+# Cambodia
+# From Paul Eggert (2014-10-11):
+# See Asia/Ho_Chi_Minh for the source for most of this data. Also, guess
+# (1) Cambodia reverted to UT +07 on 1945-09-02, when Vietnam did, and
+# (2) they also reverted to +07 on 1953-11-09, the date of independence.
+# These guesses are probably wrong but they're better than guessing no
+# transitions there.
+Zone Asia/Phnom_Penh 6:59:40 - LMT 1906 Jul 1
+ 7:06:30 - PLMT 1911 May 1
+ 7:00 - ICT 1942 Dec 31 23:00
+ 8:00 - IDT 1945 Mar 14 23:00
+ 9:00 - JST 1945 Sep 2
+ 7:00 - ICT 1947 Apr 1
+ 8:00 - IDT 1953 Nov 9
+ 7:00 - ICT
+
+# Israel
+Zone Asia/Tel_Aviv 2:19:04 - LMT 1880
+ 2:21 - JMT 1918
+ 2:00 Zion I%sT
+
+# Laos
+# From Paul Eggert (2014-10-11):
+# See Asia/Ho_Chi_Minh for the source for most of this data.
+# Trần's book says that Laos reverted to UT +07 on 1955-04-15.
+# Also, guess that Laos reverted to +07 on 1945-09-02, when Vietnam did;
+# this is probably wrong but it's better than guessing no transition.
+Zone Asia/Vientiane 6:50:24 - LMT 1906 Jul 1
+ 7:06:30 - PLMT 1911 May 1
+ 7:00 - ICT 1942 Dec 31 23:00
+ 8:00 - IDT 1945 Mar 14 23:00
+ 9:00 - JST 1945 Sep 2
+ 7:00 - ICT 1947 Apr 1
+ 8:00 - IDT 1955 Apr 15
+ 7:00 - ICT
+
+# Jan Mayen
+# From Whitman:
+Zone Atlantic/Jan_Mayen -1:00 - EGT
+
+# St Helena
+Zone Atlantic/St_Helena -0:22:48 - LMT 1890 # Jamestown
+ -0:22:48 - JMT 1951 # Jamestown Mean Time
+ 0:00 - GMT
+
+# Northern Ireland
+Zone Europe/Belfast -0:23:40 - LMT 1880 Aug 2
+ -0:25:21 - DMT 1916 May 21 2:00
+ # DMT = Dublin/Dunsink MT
+ -0:25:21 1:00 IST 1916 Oct 1 2:00s
+ # IST = Irish Summer Time
+ 0:00 GB-Eire %s 1968 Oct 27
+ 1:00 - BST 1971 Oct 31 2:00u
+ 0:00 GB-Eire %s 1996
+ 0:00 EU GMT/BST
+
+# Guernsey
+# Data from Joseph S. Myers
+# http://mm.icann.org/pipermail/tz/2013-September/019883.html
+# References to be added
+# LMT Location - 49.27N -2.33E - St.Peter Port
+Zone Europe/Guernsey -0:09:19 - LMT 1913 Jun 18
+ 0:00 GB-Eire %s 1940 Jul 2
+ 1:00 C-Eur CE%sT 1945 May 8
+ 0:00 GB-Eire %s 1968 Oct 27
+ 1:00 - BST 1971 Oct 31 2:00u
+ 0:00 GB-Eire %s 1996
+ 0:00 EU GMT/BST
+
+# Isle of Man
+#
+# From Lester Caine (2013-09-04):
+# The Isle of Man legislation is now on-line at
+# <http://www.legislation.gov.im>, starting with the original Statutory
+# Time Act in 1883 and including additional confirmation of some of
+# the dates of the 'Summer Time' orders originating at
+# Westminster. There is a little uncertainty as to the starting date
+# of the first summer time in 1916 which may have be announced a
+# couple of days late. There is still a substantial number of
+# documents to work through, but it is thought that every GB change
+# was also implemented on the island.
+#
+# AT4 of 1883 - The Statutory Time et cetera Act 1883 -
+# LMT Location - 54.1508N -4.4814E - Tynwald Hill ( Manx parliament )
+Zone Europe/Isle_of_Man -0:17:55 - LMT 1883 Mar 30 0:00s
+ 0:00 GB-Eire %s 1968 Oct 27
+ 1:00 - BST 1971 Oct 31 2:00u
+ 0:00 GB-Eire %s 1996
+ 0:00 EU GMT/BST
+
+# Jersey
+# Data from Joseph S. Myers
+# http://mm.icann.org/pipermail/tz/2013-September/019883.html
+# References to be added
+# LMT Location - 49.187N -2.107E - St. Helier
+Zone Europe/Jersey -0:08:25 - LMT 1898 Jun 11 16:00u
+ 0:00 GB-Eire %s 1940 Jul 2
+ 1:00 C-Eur CE%sT 1945 May 8
+ 0:00 GB-Eire %s 1968 Oct 27
+ 1:00 - BST 1971 Oct 31 2:00u
+ 0:00 GB-Eire %s 1996
+ 0:00 EU GMT/BST
+
+# Slovenia
+Zone Europe/Ljubljana 0:58:04 - LMT 1884
+ 1:00 - CET 1941 Apr 18 23:00
+ 1:00 C-Eur CE%sT 1945 May 8 2:00s
+ 1:00 1:00 CEST 1945 Sep 16 2:00s
+ 1:00 - CET 1982 Nov 27
+ 1:00 EU CE%sT
+
+# Bosnia and Herzegovina
+Zone Europe/Sarajevo 1:13:40 - LMT 1884
+ 1:00 - CET 1941 Apr 18 23:00
+ 1:00 C-Eur CE%sT 1945 May 8 2:00s
+ 1:00 1:00 CEST 1945 Sep 16 2:00s
+ 1:00 - CET 1982 Nov 27
+ 1:00 EU CE%sT
+
+# Macedonia
+Zone Europe/Skopje 1:25:44 - LMT 1884
+ 1:00 - CET 1941 Apr 18 23:00
+ 1:00 C-Eur CE%sT 1945 May 8 2:00s
+ 1:00 1:00 CEST 1945 Sep 16 2:00s
+ 1:00 - CET 1982 Nov 27
+ 1:00 EU CE%sT
+
+# Moldova / Transnistria
+Zone Europe/Tiraspol 1:58:32 - LMT 1880
+ 1:55 - CMT 1918 Feb 15 # Chisinau MT
+ 1:44:24 - BMT 1931 Jul 24 # Bucharest MT
+ 2:00 Romania EE%sT 1940 Aug 15
+ 2:00 1:00 EEST 1941 Jul 17
+ 1:00 C-Eur CE%sT 1944 Aug 24
+ 3:00 Russia MSK/MSD 1991 Mar 31 2:00
+ 2:00 Russia EE%sT 1992 Jan 19 2:00
+ 3:00 Russia MSK/MSD
+
+# Liechtenstein
+Zone Europe/Vaduz 0:38:04 - LMT 1894 Jun
+ 1:00 - CET 1981
+ 1:00 EU CE%sT
+
+# Croatia
+Zone Europe/Zagreb 1:03:52 - LMT 1884
+ 1:00 - CET 1941 Apr 18 23:00
+ 1:00 C-Eur CE%sT 1945 May 8 2:00s
+ 1:00 1:00 CEST 1945 Sep 16 2:00s
+ 1:00 - CET 1982 Nov 27
+ 1:00 EU CE%sT
+
+# Madagascar
+Zone Indian/Antananarivo 3:10:04 - LMT 1911 Jul
+ 3:00 - EAT 1954 Feb 27 23:00s
+ 3:00 1:00 EAST 1954 May 29 23:00s
+ 3:00 - EAT
+
+# Comoros
+Zone Indian/Comoro 2:53:04 - LMT 1911 Jul # Moroni, Gran Comoro
+ 3:00 - EAT
+
+# Mayotte
+Zone Indian/Mayotte 3:00:56 - LMT 1911 Jul # Mamoutzou
+ 3:00 - EAT
+
+# US minor outlying islands
+Zone Pacific/Johnston -10:00 - HST
+
+# US minor outlying islands
+#
+# From Mark Brader (2005-01-23):
+# [Fallacies and Fantasies of Air Transport History, by R.E.G. Davies,
+# published 1994 by Paladwr Press, McLean, VA, USA; ISBN 0-9626483-5-3]
+# reproduced a Pan American Airways timetable from 1936, for their weekly
+# "Orient Express" flights between San Francisco and Manila, and connecting
+# flights to Chicago and the US East Coast. As it uses some time zone
+# designations that I've never seen before:....
+# Fri. 6:30A Lv. HONOLOLU (Pearl Harbor), H.I. H.L.T. Ar. 5:30P Sun.
+# " 3:00P Ar. MIDWAY ISLAND . . . . . . . . . M.L.T. Lv. 6:00A "
+#
+Zone Pacific/Midway -11:49:28 - LMT 1901
+ -11:00 - NST 1956 Jun 3
+ -11:00 1:00 NDT 1956 Sep 2
+ -11:00 - NST 1967 Apr # N=Nome
+ -11:00 - BST 1983 Nov 30 # B=Bering
+ -11:00 - SST # S=Samoa
+
+# N Mariana Is
+Zone Pacific/Saipan -14:17:00 - LMT 1844 Dec 31
+ 9:43:00 - LMT 1901
+ 9:00 - MPT 1969 Oct # N Mariana Is Time
+ 10:00 - MPT 2000 Dec 23
+ 10:00 - ChST # Chamorro Standard Time
diff --git a/checklinks.awk b/checklinks.awk
new file mode 100644
index 000000000000..5b3e1571d9f4
--- /dev/null
+++ b/checklinks.awk
@@ -0,0 +1,48 @@
+# Check links in tz tables.
+
+# Contributed by Paul Eggert. This file is in the public domain.
+
+BEGIN {
+ # Special marker indicating that the name is defined as a Zone.
+ # It is a newline so that it cannot match a valid name.
+ # It is not null so that its slot does not appear unset.
+ Zone = "\n"
+}
+
+/^Zone/ {
+ if (defined[$2]) {
+ if (defined[$2] == Zone) {
+ printf "%s: Zone has duplicate definition\n", $2
+ } else {
+ printf "%s: Link with same name as Zone\n", $2
+ }
+ status = 1
+ }
+ defined[$2] = Zone
+}
+
+/^Link/ {
+ if (defined[$3]) {
+ if (defined[$3] == Zone) {
+ printf "%s: Link with same name as Zone\n", $3
+ } else if (defined[$3] == $2) {
+ printf "%s: Link has duplicate definition\n", $3
+ } else {
+ printf "%s: Link to both %s and %s\n", $3, defined[$3], $2
+ }
+ status = 1
+ }
+ used[$2] = 1
+ defined[$3] = $2
+}
+
+END {
+ for (tz in used) {
+ if (defined[tz] != Zone) {
+ printf "%s: Link to non-zone\n", tz
+ status = 1
+ }
+ }
+
+ exit status
+}
diff --git a/checktab.awk b/checktab.awk
new file mode 100644
index 000000000000..2397673e92a9
--- /dev/null
+++ b/checktab.awk
@@ -0,0 +1,177 @@
+# Check tz tables for consistency.
+
+# Contributed by Paul Eggert. This file is in the public domain.
+
+BEGIN {
+ FS = "\t"
+
+ if (!iso_table) iso_table = "iso3166.tab"
+ if (!zone_table) zone_table = "zone1970.tab"
+ if (!want_warnings) want_warnings = -1
+
+ while (getline <iso_table) {
+ iso_NR++
+ if ($0 ~ /^#/) continue
+ if (NF != 2) {
+ printf "%s:%d: wrong number of columns\n", \
+ iso_table, iso_NR >>"/dev/stderr"
+ status = 1
+ }
+ cc = $1
+ name = $2
+ if (cc !~ /^[A-Z][A-Z]$/) {
+ printf "%s:%d: invalid country code '%s'\n", \
+ iso_table, iso_NR, cc >>"/dev/stderr"
+ status = 1
+ }
+ if (cc <= cc0) {
+ if (cc == cc0) {
+ s = "duplicate";
+ } else {
+ s = "out of order";
+ }
+
+ printf "%s:%d: country code '%s' is %s\n", \
+ iso_table, iso_NR, cc, s \
+ >>"/dev/stderr"
+ status = 1
+ }
+ cc0 = cc
+ if (name2cc[name]) {
+ printf "%s:%d: '%s' and '%s' have the same name\n", \
+ iso_table, iso_NR, name2cc[name], cc \
+ >>"/dev/stderr"
+ status = 1
+ }
+ name2cc[name] = cc
+ cc2name[cc] = name
+ cc2NR[cc] = iso_NR
+ }
+
+ cc0 = ""
+
+ while (getline <zone_table) {
+ zone_NR++
+ if ($0 ~ /^#/) continue
+ if (NF != 3 && NF != 4) {
+ printf "%s:%d: wrong number of columns\n", \
+ zone_table, zone_NR >>"/dev/stderr"
+ status = 1
+ }
+ split($1, cca, /,/)
+ cc = cca[1]
+ coordinates = $2
+ tz = $3
+ comments = $4
+ if (cc < cc0) {
+ printf "%s:%d: country code '%s' is out of order\n", \
+ zone_table, zone_NR, cc >>"/dev/stderr"
+ status = 1
+ }
+ cc0 = cc
+ tztab[tz] = 1
+ tz2comments[tz] = comments
+ tz2NR[tz] = zone_NR
+ for (i in cca) {
+ cc = cca[i]
+ cctz = cc tz
+ cctztab[cctz] = 1
+ if (cc2name[cc]) {
+ cc_used[cc]++
+ } else {
+ printf "%s:%d: %s: unknown country code\n", \
+ zone_table, zone_NR, cc >>"/dev/stderr"
+ status = 1
+ }
+ }
+ if (coordinates !~ /^[-+][0-9][0-9][0-5][0-9][-+][01][0-9][0-9][0-5][0-9]$/ \
+ && coordinates !~ /^[-+][0-9][0-9][0-5][0-9][0-5][0-9][-+][01][0-9][0-9][0-5][0-9][0-5][0-9]$/) {
+ printf "%s:%d: %s: invalid coordinates\n", \
+ zone_table, zone_NR, coordinates >>"/dev/stderr"
+ status = 1
+ }
+ }
+
+ for (cctz in cctztab) {
+ cc = substr (cctz, 1, 2)
+ tz = substr (cctz, 3)
+ if (1 < cc_used[cc]) {
+ comments_needed[tz] = cc
+ }
+ }
+ for (cctz in cctztab) {
+ cc = substr (cctz, 1, 2)
+ tz = substr (cctz, 3)
+ if (!comments_needed[tz] && tz2comments[tz]) {
+ printf "%s:%d: unnecessary comment '%s'\n", \
+ zone_table, tz2NR[tz], tz2comments[tz] \
+ >>"/dev/stderr"
+ tz2comments[tz] = 0
+ status = 1
+ } else if (comments_needed[tz] && !tz2comments[tz]) {
+ printf "%s:%d: missing comment for %s\n", \
+ zone_table, tz2NR[tz], comments_needed[tz] \
+ >>"/dev/stderr"
+ tz2comments[tz] = 1
+ status = 1
+ }
+ }
+ FS = " "
+}
+
+$1 ~ /^#/ { next }
+
+{
+ tz = rules = ""
+ if ($1 == "Zone") {
+ tz = $2
+ ruleUsed[$4] = 1
+ } else if ($1 == "Link" && zone_table == "zone.tab") {
+ # Ignore Link commands if source and destination basenames
+ # are identical, e.g. Europe/Istanbul versus Asia/Istanbul.
+ src = $2
+ dst = $3
+ while ((i = index(src, "/"))) src = substr(src, i+1)
+ while ((i = index(dst, "/"))) dst = substr(dst, i+1)
+ if (src != dst) tz = $3
+ } else if ($1 == "Rule") {
+ ruleDefined[$2] = 1
+ } else {
+ ruleUsed[$2] = 1
+ }
+ if (tz && tz ~ /\//) {
+ if (!tztab[tz]) {
+ printf "%s: no data for '%s'\n", zone_table, tz \
+ >>"/dev/stderr"
+ status = 1
+ }
+ zoneSeen[tz] = 1
+ }
+}
+
+END {
+ for (tz in ruleDefined) {
+ if (!ruleUsed[tz]) {
+ printf "%s: Rule never used\n", tz
+ status = 1
+ }
+ }
+ for (tz in tztab) {
+ if (!zoneSeen[tz]) {
+ printf "%s:%d: no Zone table for '%s'\n", \
+ zone_table, tz2NR[tz], tz >>"/dev/stderr"
+ status = 1
+ }
+ }
+ if (0 < want_warnings) {
+ for (cc in cc2name) {
+ if (!cc_used[cc]) {
+ printf "%s:%d: warning: " \
+ "no Zone entries for %s (%s)\n", \
+ iso_table, cc2NR[cc], cc, cc2name[cc]
+ }
+ }
+ }
+
+ exit status
+}
diff --git a/europe b/europe
index a7dc350d1ebf..4709cc742c1a 100644
--- a/europe
+++ b/europe
@@ -1500,73 +1500,84 @@ Zone Atlantic/Reykjavik -1:28 - LMT 1908
# But these events all occurred before the 1970 cutoff,
# so record only the time in Rome.
#
-# From Paul Eggert (2006-03-22):
-# For Italian DST we have three sources: Shanks & Pottenger, Whitman, and
-# F. Pollastri
-# Day-light Saving Time in Italy (2006-02-03)
-# http://toi.iriti.cnr.it/uk/ienitlt.html
-# ('FP' below), taken from an Italian National Electrotechnical Institute
-# publication. When the three sources disagree, guess who's right, as follows:
-#
-# year FP Shanks&P. (S) Whitman (W) Go with:
-# 1916 06-03 06-03 24:00 06-03 00:00 FP & W
-# 09-30 09-30 24:00 09-30 01:00 FP; guess 24:00s
-# 1917 04-01 03-31 24:00 03-31 00:00 FP & S
-# 09-30 09-29 24:00 09-30 01:00 FP & W
-# 1918 03-09 03-09 24:00 03-09 00:00 FP & S
-# 10-06 10-05 24:00 10-06 01:00 FP & W
-# 1919 03-01 03-01 24:00 03-01 00:00 FP & S
-# 10-04 10-04 24:00 10-04 01:00 FP; guess 24:00s
-# 1920 03-20 03-20 24:00 03-20 00:00 FP & S
-# 09-18 09-18 24:00 10-01 01:00 FP; guess 24:00s
-# 1944 04-02 04-03 02:00 S (see C-Eur)
-# 09-16 10-02 03:00 FP; guess 24:00s
-# 1945 09-14 09-16 24:00 FP; guess 24:00s
-# 1970 05-21 05-31 00:00 S
-# 09-20 09-27 00:00 S
+# From Michael Deckers (2016-10-24):
+# http://www.ac-ilsestante.it/MERIDIANE/ora_legale quotes a law of 1893-08-10
+# ... [translated as] "The preceding dispositions will enter into
+# force at the instant at which, according to the time specified in
+# the 1st article, the 1st of November 1893 will begin...."
+#
+# From Pierpaolo Bernardi (2016-10-20):
+# The authoritative source for time in Italy is the national metrological
+# institute, which has a summary page of historical DST data at
+# http://www.inrim.it/res/tf/ora_legale_i.shtml
+# (2016-10-24):
+# http://www.renzobaldini.it/le-ore-legali-in-italia/
+# has still different data for 1944. It divides Italy in two, as
+# there were effectively two governments at the time, north of Gothic
+# Line German controlled territory, official government RSI, and south
+# of the Gothic Line, controlled by allied armies.
+#
+# From Brian Inglis (2016-10-23):
+# Viceregal LEGISLATIVE DECREE. 14 September 1944, no. 219.
+# Restoration of Standard Time. (044U0219) (OJ 62 of 30.9.1944) ...
+# Given the R. law decreed on 1944-03-29, no. 92, by which standard time is
+# advanced to sixty minutes later starting at hour two on 1944-04-02; ...
+# Starting at hour three on the date 1944-09-17 standard time will be resumed.
+#
+# From Paul Eggert (2016-10-27):
+# Go with INRiM for DST rules, except as corrected by Inglis for 1944
+# for the Kingdom of Italy. This is consistent with Renzo Baldini.
+# Model Rome's occupation by using using C-Eur rules from 1943-09-10
+# to 1944-06-04; although Rome was an open city during this period, it
+# was effectively controlled by Germany.
#
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
-Rule Italy 1916 only - Jun 3 0:00s 1:00 S
-Rule Italy 1916 only - Oct 1 0:00s 0 -
-Rule Italy 1917 only - Apr 1 0:00s 1:00 S
-Rule Italy 1917 only - Sep 30 0:00s 0 -
-Rule Italy 1918 only - Mar 10 0:00s 1:00 S
-Rule Italy 1918 1919 - Oct Sun>=1 0:00s 0 -
-Rule Italy 1919 only - Mar 2 0:00s 1:00 S
-Rule Italy 1920 only - Mar 21 0:00s 1:00 S
-Rule Italy 1920 only - Sep 19 0:00s 0 -
-Rule Italy 1940 only - Jun 15 0:00s 1:00 S
-Rule Italy 1944 only - Sep 17 0:00s 0 -
-Rule Italy 1945 only - Apr 2 2:00 1:00 S
-Rule Italy 1945 only - Sep 15 0:00s 0 -
-Rule Italy 1946 only - Mar 17 2:00s 1:00 S
-Rule Italy 1946 only - Oct 6 2:00s 0 -
-Rule Italy 1947 only - Mar 16 0:00s 1:00 S
-Rule Italy 1947 only - Oct 5 0:00s 0 -
-Rule Italy 1948 only - Feb 29 2:00s 1:00 S
-Rule Italy 1948 only - Oct 3 2:00s 0 -
-Rule Italy 1966 1968 - May Sun>=22 0:00 1:00 S
-Rule Italy 1966 1969 - Sep Sun>=22 0:00 0 -
-Rule Italy 1969 only - Jun 1 0:00 1:00 S
-Rule Italy 1970 only - May 31 0:00 1:00 S
-Rule Italy 1970 only - Sep lastSun 0:00 0 -
-Rule Italy 1971 1972 - May Sun>=22 0:00 1:00 S
-Rule Italy 1971 only - Sep lastSun 1:00 0 -
-Rule Italy 1972 only - Oct 1 0:00 0 -
-Rule Italy 1973 only - Jun 3 0:00 1:00 S
-Rule Italy 1973 1974 - Sep lastSun 0:00 0 -
-Rule Italy 1974 only - May 26 0:00 1:00 S
-Rule Italy 1975 only - Jun 1 0:00s 1:00 S
-Rule Italy 1975 1977 - Sep lastSun 0:00s 0 -
-Rule Italy 1976 only - May 30 0:00s 1:00 S
-Rule Italy 1977 1979 - May Sun>=22 0:00s 1:00 S
-Rule Italy 1978 only - Oct 1 0:00s 0 -
-Rule Italy 1979 only - Sep 30 0:00s 0 -
+Rule Italy 1916 only - Jun 3 24:00 1:00 S
+Rule Italy 1916 1917 - Sep 30 24:00 0 -
+Rule Italy 1917 only - Mar 31 24:00 1:00 S
+Rule Italy 1918 only - Mar 9 24:00 1:00 S
+Rule Italy 1918 only - Oct 6 24:00 0 -
+Rule Italy 1919 only - Mar 1 24:00 1:00 S
+Rule Italy 1919 only - Oct 4 24:00 0 -
+Rule Italy 1920 only - Mar 20 24:00 1:00 S
+Rule Italy 1920 only - Sep 18 24:00 0 -
+Rule Italy 1940 only - Jun 14 24:00 1:00 S
+Rule Italy 1942 only - Nov 2 2:00s 0 -
+Rule Italy 1943 only - Mar 29 2:00s 1:00 S
+Rule Italy 1943 only - Oct 4 2:00s 0 -
+Rule Italy 1944 only - Apr 2 2:00s 1:00 S
+Rule Italy 1944 only - Sep 17 2:00s 0 -
+Rule Italy 1945 only - Apr 2 2:00 1:00 S
+Rule Italy 1945 only - Sep 15 1:00 0 -
+Rule Italy 1946 only - Mar 17 2:00s 1:00 S
+Rule Italy 1946 only - Oct 6 2:00s 0 -
+Rule Italy 1947 only - Mar 16 0:00s 1:00 S
+Rule Italy 1947 only - Oct 5 0:00s 0 -
+Rule Italy 1948 only - Feb 29 2:00s 1:00 S
+Rule Italy 1948 only - Oct 3 2:00s 0 -
+Rule Italy 1966 1968 - May Sun>=22 0:00s 1:00 S
+Rule Italy 1966 only - Sep 24 24:00 0 -
+Rule Italy 1967 1969 - Sep Sun>=22 0:00s 0 -
+Rule Italy 1969 only - Jun 1 0:00s 1:00 S
+Rule Italy 1970 only - May 31 0:00s 1:00 S
+Rule Italy 1970 only - Sep lastSun 0:00s 0 -
+Rule Italy 1971 1972 - May Sun>=22 0:00s 1:00 S
+Rule Italy 1971 only - Sep lastSun 0:00s 0 -
+Rule Italy 1972 only - Oct 1 0:00s 0 -
+Rule Italy 1973 only - Jun 3 0:00s 1:00 S
+Rule Italy 1973 1974 - Sep lastSun 0:00s 0 -
+Rule Italy 1974 only - May 26 0:00s 1:00 S
+Rule Italy 1975 only - Jun 1 0:00s 1:00 S
+Rule Italy 1975 1977 - Sep lastSun 0:00s 0 -
+Rule Italy 1976 only - May 30 0:00s 1:00 S
+Rule Italy 1977 1979 - May Sun>=22 0:00s 1:00 S
+Rule Italy 1978 only - Oct 1 0:00s 0 -
+Rule Italy 1979 only - Sep 30 0:00s 0 -
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Europe/Rome 0:49:56 - LMT 1866 Sep 22
- 0:49:56 - RMT 1893 Nov 1 0:00s # Rome Mean
- 1:00 Italy CE%sT 1942 Nov 2 2:00s
- 1:00 C-Eur CE%sT 1944 Jul
+ 0:49:56 - RMT 1893 Oct 31 23:49:56 # Rome Mean
+ 1:00 Italy CE%sT 1943 Sep 10
+ 1:00 C-Eur CE%sT 1944 Jun 4
1:00 Italy CE%sT 1980
1:00 EU CE%sT
@@ -1765,6 +1776,10 @@ Zone Europe/Luxembourg 0:24:36 - LMT 1904 Jun
# See Europe/Belgrade.
# Malta
+#
+# From Paul Eggert (2016-10-21):
+# Assume 1900-1972 was like Rome, overriding Shanks.
+#
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Malta 1973 only - Mar 31 0:00s 1:00 S
Rule Malta 1973 only - Sep 29 0:00s 0 -
@@ -1775,8 +1790,6 @@ Rule Malta 1975 1980 - Sep Sun>=15 2:00 0 -
Rule Malta 1980 only - Mar 31 2:00 1:00 S
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Europe/Malta 0:58:04 - LMT 1893 Nov 2 0:00s # Valletta
- 1:00 Italy CE%sT 1942 Nov 2 2:00s
- 1:00 C-Eur CE%sT 1945 Apr 2 2:00s
1:00 Italy CE%sT 1973 Mar 31
1:00 Malta CE%sT 1981
1:00 EU CE%sT
@@ -1908,7 +1921,7 @@ Zone Europe/Monaco 0:29:32 - LMT 1891 Mar 15
# Amsterdam mean time.
# The data entries before 1945 are taken from
-# http://www.staff.science.uu.nl/~gent0113/idl/idl.htm
+# http://www.staff.science.uu.nl/~gent0113/wettijd/wettijd.htm
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Neth 1916 only - May 1 0:00 1:00 NST # Netherlands Summer Time
diff --git a/leapseconds.awk b/leapseconds.awk
new file mode 100644
index 000000000000..21fe540791b5
--- /dev/null
+++ b/leapseconds.awk
@@ -0,0 +1,76 @@
+# Generate the 'leapseconds' file from 'leap-seconds.list'.
+
+# This file is in the public domain.
+
+BEGIN {
+ print "# Allowance for leap seconds added to each time zone file."
+ print ""
+ print "# This file is in the public domain."
+ print ""
+ print "# This file is generated automatically from the data in the public-domain"
+ print "# leap-seconds.list file available from most NIST time servers."
+ print "# If the URL <ftp://time.nist.gov/pub/leap-seconds.list> does not work,"
+ print "# you should be able to pick up leap-seconds.list from a secondary NIST server."
+ print "# See <http://tf.nist.gov/tf-cgi/servers.cgi> for a list of secondary servers."
+ print "# For more about leap-seconds.list, please see"
+ print "# The NTP Timescale and Leap Seconds"
+ print "# http://www.eecis.udel.edu/~mills/leap.html"
+ print ""
+ print "# The International Earth Rotation and Reference Systems Service"
+ print "# periodically uses leap seconds to keep UTC to within 0.9 s of UT1"
+ print "# (which measures the true angular orientation of the earth in space); see"
+ print "# Terry J Quinn, The BIPM and the accurate measure of time,"
+ print "# Proc IEEE 79, 7 (July 1991), 894-905 <http://dx.doi.org/10.1109/5.84965>."
+ print "# There were no leap seconds before 1972, because the official mechanism"
+ print "# accounting for the discrepancy between atomic time and the earth's rotation"
+ print "# did not exist until the early 1970s."
+ print ""
+ print "# The correction (+ or -) is made at the given time, so lines"
+ print "# will typically look like:"
+ print "# Leap YEAR MON DAY 23:59:60 + R/S"
+ print "# or"
+ print "# Leap YEAR MON DAY 23:59:59 - R/S"
+ print ""
+ print "# If the leapsecond is Rolling (R) the given time is local time."
+ print "# If the leapsecond is Stationary (S) the given time is UTC."
+ print ""
+ print "# Leap YEAR MONTH DAY HH:MM:SS CORR R/S"
+}
+
+/^ *$/ { next }
+
+/^#\tUpdated through/ || /^#\tFile expires on:/ {
+ last_lines = last_lines $0 "\n"
+}
+
+/^#/ { next }
+
+{
+ NTP_timestamp = $1
+ TAI_minus_UTC = $2
+ hash_mark = $3
+ one = $4
+ month = $5
+ year = $6
+ if (old_TAI_minus_UTC) {
+ if (old_TAI_minus_UTC < TAI_minus_UTC) {
+ sign = "23:59:60\t+"
+ } else {
+ sign = "23:59:59\t-"
+ }
+ if (month == "Jan") {
+ year--;
+ month = "Dec";
+ day = 31
+ } else if (month == "Jul") {
+ month = "Jun";
+ day = 30
+ }
+ printf "Leap\t%s\t%s\t%s\t%s\tS\n", year, month, day, sign
+ }
+ old_TAI_minus_UTC = TAI_minus_UTC
+}
+
+END {
+ printf "\n%s", last_lines
+}
diff --git a/version b/version
new file mode 100644
index 000000000000..bc96124d710f
--- /dev/null
+++ b/version
@@ -0,0 +1 @@
+2016i
diff --git a/zone.tab b/zone.tab
index cf774b5dc20c..f4969d29b838 100644
--- a/zone.tab
+++ b/zone.tab
@@ -152,7 +152,8 @@ CU +2308-08222 America/Havana
CV +1455-02331 Atlantic/Cape_Verde
CW +1211-06900 America/Curacao
CX -1025+10543 Indian/Christmas
-CY +3510+03322 Asia/Nicosia
+CY +3510+03322 Asia/Nicosia Cyprus (most areas)
+CY +3507+03357 Asia/Famagusta Northern Cyprus
CZ +5005+01426 Europe/Prague
DE +5230+01322 Europe/Berlin Germany (most areas)
DE +4742+00841 Europe/Busingen Busingen
diff --git a/zone1970.tab b/zone1970.tab
index b7372cf671b8..f48f7a6b56be 100644
--- a/zone1970.tab
+++ b/zone1970.tab
@@ -144,7 +144,8 @@ CU +2308-08222 America/Havana
CV +1455-02331 Atlantic/Cape_Verde
CW,AW,BQ,SX +1211-06900 America/Curacao
CX -1025+10543 Indian/Christmas
-CY +3510+03322 Asia/Nicosia
+CY +3510+03322 Asia/Nicosia Cyprus (most areas)
+CY +3507+03357 Asia/Famagusta Northern Cyprus
CZ,SK +5005+01426 Europe/Prague
DE +5230+01322 Europe/Berlin Germany (most areas)
DK +5540+01235 Europe/Copenhagen
diff --git a/zoneinfo2tdf.pl b/zoneinfo2tdf.pl
new file mode 100755
index 000000000000..e05ec010082a
--- /dev/null
+++ b/zoneinfo2tdf.pl
@@ -0,0 +1,52 @@
+#! /usr/bin/perl -w
+
+# Courtesy Ken Pizzini.
+
+use strict;
+
+#This file released to the public domain.
+
+# Note: error checking is poor; trust the output only if the input
+# has been checked by zic.
+
+my $contZone = '';
+while (<>) {
+ my $origline = $_;
+ my @fields = ();
+ while (s/^\s*((?:"[^"]*"|[^\s#])+)//) {
+ push @fields, $1;
+ }
+ next unless @fields;
+
+ my $type = lc($fields[0]);
+ if ($contZone) {
+ @fields >= 3 or warn "bad continuation line";
+ unshift @fields, '+', $contZone;
+ $type = 'zone';
+ }
+
+ $contZone = '';
+ if ($type eq 'zone') {
+ # Zone NAME GMTOFF RULES/SAVE FORMAT [UNTIL]
+ my $nfields = @fields;
+ $nfields >= 5 or warn "bad zone line";
+ if ($nfields > 6) {
+ #this splice is optional, depending on one's preference
+ #(one big date-time field, or componentized date and time):
+ splice(@fields, 5, $nfields-5, "@fields[5..$nfields-1]");
+ }
+ $contZone = $fields[1] if @fields > 5;
+ } elsif ($type eq 'rule') {
+ # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
+ @fields == 10 or warn "bad rule line";
+ } elsif ($type eq 'link') {
+ # Link TARGET LINK-NAME
+ @fields == 3 or warn "bad link line";
+ } elsif ($type eq 'leap') {
+ # Leap YEAR MONTH DAY HH:MM:SS CORR R/S
+ @fields == 7 or warn "bad leap line";
+ } else {
+ warn "Fubar at input line $.: $origline";
+ }
+ print join("\t", @fields), "\n";
+}