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author | edwin <edwin@FreeBSD.org> | 2010-02-25 06:31:05 +0000 |
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committer | edwin <edwin@FreeBSD.org> | 2010-02-25 06:31:05 +0000 |
commit | 44aa2ddcdd587df8d3f0a8d920e849bcecc6be29 (patch) | |
tree | 9e3f5c645fe96404bb223b944c59bc4657c3af3f /contrib/tzdata/leapseconds | |
parent | 0be33967dc512560f54754fcae2582d46ae93bf9 (diff) | |
download | FreeBSD-src-44aa2ddcdd587df8d3f0a8d920e849bcecc6be29.zip FreeBSD-src-44aa2ddcdd587df8d3f0a8d920e849bcecc6be29.tar.gz |
Copy share/zoneinfo to contrib/zoneinfo for the proper split of
contributed data and FreeBSD specific data.
Diffstat (limited to 'contrib/tzdata/leapseconds')
-rw-r--r-- | contrib/tzdata/leapseconds | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/contrib/tzdata/leapseconds b/contrib/tzdata/leapseconds new file mode 100644 index 0000000..a3c95ef --- /dev/null +++ b/contrib/tzdata/leapseconds @@ -0,0 +1,87 @@ +# <pre> +# @(#)leapseconds 8.9 +# 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 + +# 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, 4 July 2009 +# +# Bulletin C 38 +# +# 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 December 2009. +# The difference between Coordinated Universal Time UTC and the +# International Atomic Time TAI is : +# +# from 2009 January 1, 0h UTC, until further notice : UTC-TAI = -34 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 +# Director +# Earth Orientation Center of IERS +# Observatoire de Paris, France |