| leapseconds (325324) | leapseconds (309583) |
|---|---|
| 1# Allowance for leap seconds added to each time zone file. 2 3# This file is in the public domain. 4 5# This file is generated automatically from the data in the public-domain | 1# Allowance for leap seconds added to each time zone file. 2 3# This file is in the public domain. 4 5# This file is generated automatically from the data in the public-domain |
| 6# leap-seconds.list file, which is copied from: 7# ftp://ftp.nist.gov/pub/time/leap-seconds.list | 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. |
| 8# For more about leap-seconds.list, please see 9# The NTP Timescale and Leap Seconds | 10# For more about leap-seconds.list, please see 11# The NTP Timescale and Leap Seconds |
| 10# https://www.eecis.udel.edu/~mills/leap.html | 12# http://www.eecis.udel.edu/~mills/leap.html |
| 11 12# The International Earth Rotation and Reference Systems Service 13# periodically uses leap seconds to keep UTC to within 0.9 s of UT1 14# (which measures the true angular orientation of the earth in space); see | 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 16# (which measures the true angular orientation of the earth in space); see |
| 15# Levine J. Coordinated Universal Time and the leap second. 16# URSI Radio Sci Bull. 2016;89(4):30-6. doi:10.23919/URSIRSB.2016.7909995 17# http://ieeexplore.ieee.org/document/7909995/ | 17# Terry J Quinn, The BIPM and the accurate measure of time, 18# Proc IEEE 79, 7 (July 1991), 894-905 <http://dx.doi.org/10.1109/5.84965>. |
| 18# There were no leap seconds before 1972, because the official mechanism 19# accounting for the discrepancy between atomic time and the earth's rotation 20# did not exist until the early 1970s. 21 22# The correction (+ or -) is made at the given time, so lines 23# will typically look like: 24# Leap YEAR MON DAY 23:59:60 + R/S 25# or --- 26 unchanged lines hidden (view full) --- 52Leap 1997 Jun 30 23:59:60 + S 53Leap 1998 Dec 31 23:59:60 + S 54Leap 2005 Dec 31 23:59:60 + S 55Leap 2008 Dec 31 23:59:60 + S 56Leap 2012 Jun 30 23:59:60 + S 57Leap 2015 Jun 30 23:59:60 + S 58Leap 2016 Dec 31 23:59:60 + S 59 | 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 --- 26 unchanged lines hidden (view full) --- 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 60 |
| 60# Updated through IERS Bulletin C54 61# File expires on: 28 June 2018 | 61# Updated through IERS Bulletin C52 62# File expires on: 28 June 2017 |