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authorXin LI <delphij@FreeBSD.org>2015-08-22 07:33:57 +0000
committerXin LI <delphij@FreeBSD.org>2015-08-22 07:33:57 +0000
commitbd792353dea284d041bfd4bec907246d8a68e5ee (patch)
tree27bd5ca0df9c5dc145d2514ce71a1907f228c39b
parentdd8f55dee620185ff9a6c3c4d1ac0756e6629e02 (diff)
downloadsrc-bd792353dea284d041bfd4bec907246d8a68e5ee.tar.gz
src-bd792353dea284d041bfd4bec907246d8a68e5ee.zip
Restore leapseconds@255901.
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Notes: svn path=/vendor/tzdata/dist/; revision=287017
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+# <pre>
+# This file is in the public domain, so clarified as of
+# 2009-05-17 by Arthur David Olson.
+
+# Allowance for leapseconds added to each timezone file.
+
+# The International Earth Rotation Service periodically uses leap seconds
+# to keep UTC to within 0.9 s of UT1
+# (which measures the true angular orientation of the earth in space); see
+# Terry J Quinn, The BIPM and the accurate measure of time,
+# Proc IEEE 79, 7 (July 1991), 894-905.
+# There were no leap seconds before 1972, because the official mechanism
+# accounting for the discrepancy between atomic time and the earth's rotation
+# did not exist until the early 1970s.
+
+# The correction (+ or -) is made at the given time, so lines
+# will typically look like:
+# Leap YEAR MON DAY 23:59:60 + R/S
+# or
+# Leap YEAR MON DAY 23:59:59 - R/S
+
+# If the leapsecond is Rolling (R) the given time is local time
+# If the leapsecond is Stationary (S) the given time is UTC
+
+# Leap YEAR MONTH DAY HH:MM:SS CORR R/S
+Leap 1972 Jun 30 23:59:60 + S
+Leap 1972 Dec 31 23:59:60 + S
+Leap 1973 Dec 31 23:59:60 + S
+Leap 1974 Dec 31 23:59:60 + S
+Leap 1975 Dec 31 23:59:60 + S
+Leap 1976 Dec 31 23:59:60 + S
+Leap 1977 Dec 31 23:59:60 + S
+Leap 1978 Dec 31 23:59:60 + S
+Leap 1979 Dec 31 23:59:60 + S
+Leap 1981 Jun 30 23:59:60 + S
+Leap 1982 Jun 30 23:59:60 + S
+Leap 1983 Jun 30 23:59:60 + S
+Leap 1985 Jun 30 23:59:60 + S
+Leap 1987 Dec 31 23:59:60 + S
+Leap 1989 Dec 31 23:59:60 + S
+Leap 1990 Dec 31 23:59:60 + S
+Leap 1992 Jun 30 23:59:60 + S
+Leap 1993 Jun 30 23:59:60 + S
+Leap 1994 Jun 30 23:59:60 + S
+Leap 1995 Dec 31 23:59:60 + S
+Leap 1997 Jun 30 23:59:60 + S
+Leap 1998 Dec 31 23:59:60 + S
+Leap 2005 Dec 31 23:59:60 + S
+Leap 2008 Dec 31 23:59:60 + S
+Leap 2012 Jun 30 23:59:60 + S
+
+# INTERNATIONAL EARTH ROTATION AND REFERENCE SYSTEMS SERVICE (IERS)
+#
+# SERVICE INTERNATIONAL DE LA ROTATION TERRESTRE ET DES SYSTEMES DE REFERENCE
+#
+#
+# SERVICE DE LA ROTATION TERRESTRE
+# OBSERVATOIRE DE PARIS
+# 61, Av. de l'Observatoire 75014 PARIS (France)
+# Tel. : 33 (0) 1 40 51 22 26
+# FAX : 33 (0) 1 40 51 22 91
+# e-mail : (E-Mail Removed)
+# http://hpiers.obspm.fr/eop-pc
+#
+# Paris, 5 January 2012
+#
+#
+# Bulletin C 43
+#
+# To authorities responsible
+# for the measurement and
+# distribution of time
+#
+#
+# UTC TIME STEP
+# on the 1st of July 2012
+#
+#
+# A positive leap second will be introduced at the end of June 2012.
+# The sequence of dates of the UTC second markers will be:
+#
+# 2012 June 30, 23h 59m 59s
+# 2012 June 30, 23h 59m 60s
+# 2012 July 1, 0h 0m 0s
+#
+# The difference between UTC and the International Atomic Time TAI is:
+#
+# from 2009 January 1, 0h UTC, to 2012 July 1 0h UTC : UTC-TAI = - 34s
+# from 2012 July 1, 0h UTC, until further notice : UTC-TAI = - 35s
+#
+# Leap seconds can be introduced in UTC at the end of the months of December
+# or June, depending on the evolution of UT1-TAI. Bulletin C is mailed every
+# six months, either to announce a time step in UTC or to confirm that there
+# will be no time step at the next possible date.
+#
+#
+# Daniel GAMBIS
+# Head
+# Earth Orientation Center of IERS
+# Observatoire de Paris, France