| leapseconds (285830) | leapseconds (309576) |
|---|---|
| 1# <pre> 2# This file is in the public domain, so clarified as of 3# 2009-05-17 by Arthur David Olson. | 1# Allowance for leap seconds added to each time zone file. |
| 4 | 2 |
| 5# Allowance for leapseconds added to each timezone file. | 3# This file is in the public domain. |
| 6 | 4 |
| 7# The International Earth Rotation Service periodically uses leap seconds 8# to keep UTC to within 0.9 s of UT1 | 5# This file is generated automatically from the data in the public-domain 6# leap-seconds.list file available from most NIST time servers. 7# If the URL <ftp://time.nist.gov/pub/leap-seconds.list> does not work, 8# you should be able to pick up leap-seconds.list from a secondary NIST server. 9# See <http://tf.nist.gov/tf-cgi/servers.cgi> for a list of secondary servers. 10# For more about leap-seconds.list, please see 11# The NTP Timescale and Leap Seconds 12# http://www.eecis.udel.edu/~mills/leap.html 13 14# The International Earth Rotation and Reference Systems Service 15# periodically uses leap seconds to keep UTC to within 0.9 s of UT1 |
| 9# (which measures the true angular orientation of the earth in space); see 10# Terry J Quinn, The BIPM and the accurate measure of time, | 16# (which measures the true angular orientation of the earth in space); see 17# Terry J Quinn, The BIPM and the accurate measure of time, |
| 11# Proc IEEE 79, 7 (July 1991), 894-905. | 18# Proc IEEE 79, 7 (July 1991), 894-905 <http://dx.doi.org/10.1109/5.84965>. |
| 12# There were no leap seconds before 1972, because the official mechanism 13# accounting for the discrepancy between atomic time and the earth's rotation 14# did not exist until the early 1970s. 15 16# The correction (+ or -) is made at the given time, so lines 17# will typically look like: 18# Leap YEAR MON DAY 23:59:60 + R/S 19# or 20# Leap YEAR MON DAY 23:59:59 - R/S 21 | 19# There were no leap seconds before 1972, because the official mechanism 20# accounting for the discrepancy between atomic time and the earth's rotation 21# did not exist until the early 1970s. 22 23# The correction (+ or -) is made at the given time, so lines 24# will typically look like: 25# Leap YEAR MON DAY 23:59:60 + R/S 26# or 27# Leap YEAR MON DAY 23:59:59 - R/S 28 |
| 22# If the leapsecond is Rolling (R) the given time is local time 23# If the leapsecond is Stationary (S) the given time is UTC | 29# If the leapsecond is Rolling (R) the given time is local time. 30# If the leapsecond is Stationary (S) the given time is UTC. |
| 24 25# Leap YEAR MONTH DAY HH:MM:SS CORR R/S 26Leap 1972 Jun 30 23:59:60 + S 27Leap 1972 Dec 31 23:59:60 + S 28Leap 1973 Dec 31 23:59:60 + S 29Leap 1974 Dec 31 23:59:60 + S 30Leap 1975 Dec 31 23:59:60 + S 31Leap 1976 Dec 31 23:59:60 + S --- 11 unchanged lines hidden (view full) --- 43Leap 1993 Jun 30 23:59:60 + S 44Leap 1994 Jun 30 23:59:60 + S 45Leap 1995 Dec 31 23:59:60 + S 46Leap 1997 Jun 30 23:59:60 + S 47Leap 1998 Dec 31 23:59:60 + S 48Leap 2005 Dec 31 23:59:60 + S 49Leap 2008 Dec 31 23:59:60 + S 50Leap 2012 Jun 30 23:59:60 + S | 31 32# Leap YEAR MONTH DAY HH:MM:SS CORR R/S 33Leap 1972 Jun 30 23:59:60 + S 34Leap 1972 Dec 31 23:59:60 + S 35Leap 1973 Dec 31 23:59:60 + S 36Leap 1974 Dec 31 23:59:60 + S 37Leap 1975 Dec 31 23:59:60 + S 38Leap 1976 Dec 31 23:59:60 + S --- 11 unchanged lines hidden (view full) --- 50Leap 1993 Jun 30 23:59:60 + S 51Leap 1994 Jun 30 23:59:60 + S 52Leap 1995 Dec 31 23:59:60 + S 53Leap 1997 Jun 30 23:59:60 + S 54Leap 1998 Dec 31 23:59:60 + S 55Leap 2005 Dec 31 23:59:60 + S 56Leap 2008 Dec 31 23:59:60 + S 57Leap 2012 Jun 30 23:59:60 + S |
| 58Leap 2015 Jun 30 23:59:60 + S 59Leap 2016 Dec 31 23:59:60 + S |
|
| 51 | 60 |
| 52# INTERNATIONAL EARTH ROTATION AND REFERENCE SYSTEMS SERVICE (IERS) 53# 54# SERVICE INTERNATIONAL DE LA ROTATION TERRESTRE ET DES SYSTEMES DE REFERENCE 55# 56# 57# SERVICE DE LA ROTATION TERRESTRE 58# OBSERVATOIRE DE PARIS 59# 61, Av. de l'Observatoire 75014 PARIS (France) 60# Tel. : 33 (0) 1 40 51 22 26 61# FAX : 33 (0) 1 40 51 22 91 62# e-mail : (E-Mail Removed) 63# http://hpiers.obspm.fr/eop-pc 64# 65# Paris, 5 January 2012 66# 67# 68# Bulletin C 43 69# 70# To authorities responsible 71# for the measurement and 72# distribution of time 73# 74# 75# UTC TIME STEP 76# on the 1st of July 2012 77# 78# 79# A positive leap second will be introduced at the end of June 2012. 80# The sequence of dates of the UTC second markers will be: 81# 82# 2012 June 30, 23h 59m 59s 83# 2012 June 30, 23h 59m 60s 84# 2012 July 1, 0h 0m 0s 85# 86# The difference between UTC and the International Atomic Time TAI is: 87# 88# from 2009 January 1, 0h UTC, to 2012 July 1 0h UTC : UTC-TAI = - 34s 89# from 2012 July 1, 0h UTC, until further notice : UTC-TAI = - 35s 90# 91# Leap seconds can be introduced in UTC at the end of the months of December 92# or June, depending on the evolution of UT1-TAI. Bulletin C is mailed every 93# six months, either to announce a time step in UTC or to confirm that there 94# will be no time step at the next possible date. 95# 96# 97# Daniel GAMBIS 98# Head 99# Earth Orientation Center of IERS 100# Observatoire de Paris, France | 61# Updated through IERS Bulletin C52 62# File expires on: 28 June 2017 |