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authorEdwin Groothuis <edwin@FreeBSD.org>2008-08-07 23:59:20 +0000
committerEdwin Groothuis <edwin@FreeBSD.org>2008-08-07 23:59:20 +0000
commitaf252fa7e62ab66ef0c5b951e21663961a741130 (patch)
tree4266dd27c003200e903f407d4e87215b2ff6eec1 /leapseconds
parentdbe4cee6139181fb0779292359140fbd54afb257 (diff)
downloadsrc-af252fa7e62ab66ef0c5b951e21663961a741130.tar.gz
src-af252fa7e62ab66ef0c5b951e21663961a741130.zip
Flatting the vendor dist tree of tzdata.
Approved by: bde (mentor, implicit), des
Notes
Notes: svn path=/vendor/tzdata/dist/; revision=181400
Diffstat (limited to 'leapseconds')
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1 files changed, 83 insertions, 0 deletions
diff --git a/leapseconds b/leapseconds
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+# @(#)leapseconds 8.5
+
+# 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
+
+# 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
+# Internet : services.iers@obspm.fr
+#
+# Paris, 18 January 2008
+#
+# Bulletin C 35
+#
+# To authorities responsible
+# for the measurement and
+# distribution of time
+#
+# INFORMATION ON UTC - TAI
+#
+# NO positive leap second will be introduced at the end of June 2008.
+# The difference between Coordinated Universal Time UTC and the
+# International Atomic Time TAI is :
+#
+# from 2006 January 1, 0h UTC, until further notice : UTC-TAI = -33 s
+#
+# 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 the IERS
+# Observatoire de Paris, France