diff options
Diffstat (limited to 'contrib/tzdata/leapseconds')
-rw-r--r-- | contrib/tzdata/leapseconds | 70 |
1 files changed, 57 insertions, 13 deletions
diff --git a/contrib/tzdata/leapseconds b/contrib/tzdata/leapseconds index 0a48dac..5b5c70e 100644 --- a/contrib/tzdata/leapseconds +++ b/contrib/tzdata/leapseconds @@ -1,20 +1,14 @@ -# Allowance for leapseconds added to each timezone file. - -# This file is in the public domain. +# <pre> +# This file is in the public domain, so clarified as of +# 2009-05-17 by Arthur David Olson. -# This file is generated automatically from the data in the public-domain -# leap-seconds.list file available from most NIST time servers. -# If the URL <ftp://time.nist.gov/pub/leap-seconds.list> does not work, -# you should be able to pick up leap-seconds.list from a secondary NIST server. -# For more about leap-seconds.list, please see -# The NTP Timescale and Leap Seconds -# <http://www.eecis.udel.edu/~mills/leap.html>. +# 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 <http://dx.doi.org/10.1109/5.84965>. +# 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. @@ -25,8 +19,8 @@ # 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. +# 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 @@ -54,3 +48,53 @@ 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 |