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Updates to historic rules only for: part of Alaska, Algeria, Bulgaria, Colombia, Easter Island, Italy, Malta, Mexico, Mongolia, Montserrat, Puerto Rico, Poland, Russia, South Korea, Spain, part of North Dakota, United Kingdom, Uruguay, Uzbekistan Updates to current and future rules for: Guatemala, Haiti, Honduras, part of Indiana, Iran, Nicaragua, Palestinian Territories, Sri Lanka, Tunisia, Updates to future rules only for: Canada, Thule AFB in Greenland
93 lines
3.0 KiB
Plaintext
93 lines
3.0 KiB
Plaintext
# @(#)leapseconds 8.1
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# Allowance for leapseconds added to each timezone file.
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# The International Earth Rotation Service periodically uses leap seconds
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# to keep UTC to within 0.9 s of UT1
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# (which measures the true angular orientation of the earth in space); see
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# Terry J Quinn, The BIPM and the accurate measure of time,
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# Proc IEEE 79, 7 (July 1991), 894-905.
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# There were no leap seconds before 1972, because the official mechanism
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# accounting for the discrepancy between atomic time and the earth's rotation
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# did not exist until the early 1970s.
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# The correction (+ or -) is made at the given time, so lines
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# will typically look like:
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# Leap YEAR MON DAY 23:59:60 + R/S
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# or
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# Leap YEAR MON DAY 23:59:59 - R/S
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# If the leapsecond is Rolling (R) the given time is local time
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# If the leapsecond is Stationary (S) the given time is UTC
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# Leap YEAR MONTH DAY HH:MM:SS CORR R/S
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Leap 1972 Jun 30 23:59:60 + S
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Leap 1972 Dec 31 23:59:60 + S
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Leap 1973 Dec 31 23:59:60 + S
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Leap 1974 Dec 31 23:59:60 + S
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Leap 1975 Dec 31 23:59:60 + S
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Leap 1976 Dec 31 23:59:60 + S
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Leap 1977 Dec 31 23:59:60 + S
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Leap 1978 Dec 31 23:59:60 + S
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Leap 1979 Dec 31 23:59:60 + S
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Leap 1981 Jun 30 23:59:60 + S
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Leap 1982 Jun 30 23:59:60 + S
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Leap 1983 Jun 30 23:59:60 + S
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Leap 1985 Jun 30 23:59:60 + S
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Leap 1987 Dec 31 23:59:60 + S
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Leap 1989 Dec 31 23:59:60 + S
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Leap 1990 Dec 31 23:59:60 + S
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Leap 1992 Jun 30 23:59:60 + S
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Leap 1993 Jun 30 23:59:60 + S
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Leap 1994 Jun 30 23:59:60 + S
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Leap 1995 Dec 31 23:59:60 + S
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Leap 1997 Jun 30 23:59:60 + S
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Leap 1998 Dec 31 23:59:60 + S
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Leap 2005 Dec 31 23:59:60 + S
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# INTERNATIONAL EARTH ROTATION AND REFERENCE SYSTEMS SERVICE (IERS)
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#
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# SERVICE INTERNATIONAL DE LA ROTATION TERRESTRE ET DES SYSTEMES DE REFERENCE
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#
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# SERVICE DE LA ROTATION TERRESTRE
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# OBSERVATOIRE DE PARIS
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# 61, Av. de l'Observatoire 75014 PARIS (France)
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# Tel. : 33 (0) 1 40 51 22 26
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# FAX : 33 (0) 1 40 51 22 91
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# ...
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# http://hpiers.obspm.fr/eop-pc
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#
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# Paris, 4 July 2005
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#
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# Bulletin C 30
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#
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# To authorities responsible
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# for the measurement and
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# distribution of time
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#
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#
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# UTC TIME STEP
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# on the 1st of January 2006
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#
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# A positive leap second will be introduced at the end of December 2005.
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# The sequence of dates of the UTC second markers will be:
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#
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# 2005 December 31, 23h 59m 59s
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# 2005 December 31, 23h 59m 60s
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# 2006 January 1, 0h 0m 0s
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#
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# The difference between UTC and the International Atomic Time TAI is:
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#
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# from 1999 January 1, 0h UTC, to 2006 January 1 0h UTC : UTC-TAI = - 32s
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# from 2006 January 1, 0h UTC, until further notice : UTC-TAI = - 33s
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#
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# Leap seconds can be introduced in UtC at the end of the months of December
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# or June, depending on the evolution of UT1-TAI. Bulletin C is mailed every
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# six months, either to announce a time step in UTC or to confirm that there
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# will be no time step at the next possible date.
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#
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# Daniel GAMBIS
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# Head
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# Earth Orientation Center of IERS
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# Observatoire de Paris, France
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