make/data/tzdata/leapseconds
author herrick
Thu, 28 Mar 2019 13:49:38 -0400
branchJDK-8200758-branch
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child 55634 0f1e29c77e50
child 58678 9cf78a70fa4f
permissions -rw-r--r--
Merge
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#
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# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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#
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# This code is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License version 2 only, as
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# published by the Free Software Foundation.  Oracle designates this
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# particular file as subject to the "Classpath" exception as provided
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# by Oracle in the LICENSE file that accompanied this code.
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#
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# This code is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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# version 2 for more details (a copy is included in the LICENSE file that
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# accompanied this code).
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#
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# You should have received a copy of the GNU General Public License version
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# 2 along with this work; if not, write to the Free Software Foundation,
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# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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#
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# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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# or visit www.oracle.com if you need additional information or have any
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# questions.
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#
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# Allowance for leap seconds added to each time zone file.
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# This file is in the public domain.
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# This file is generated automatically from the data in the public-domain
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# leap-seconds.list file, which can be copied from
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# <ftp://ftp.nist.gov/pub/time/leap-seconds.list>
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# or <ftp://ftp.boulder.nist.gov/pub/time/leap-seconds.list>
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# or <ftp://tycho.usno.navy.mil/pub/ntp/leap-seconds.list>.
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# For more about leap-seconds.list, please see
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# The NTP Timescale and Leap Seconds
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# <https://www.eecis.udel.edu/~mills/leap.html>.
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# The International Earth Rotation and Reference Systems Service
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# periodically uses leap seconds 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)
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# and publishes leap second data in a copyrighted file
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# <https://hpiers.obspm.fr/iers/bul/bulc/Leap_Second.dat>.
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# See: Levine J. Coordinated Universal Time and the leap second.
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# URSI Radio Sci Bull. 2016;89(4):30-6. doi:10.23919/URSIRSB.2016.7909995
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# <https://ieeexplore.ieee.org/document/7909995>.
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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.
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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 leap second is Rolling (R) the given time is local time (unused here).
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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	1981	Jun	30	23:59:60	+	S
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Leap	1983	Jun	30	23:59:60	+	S
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Leap	2005	Dec	31	23:59:60	+	S
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Leap	2008	Dec	31	23:59:60	+	S
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Leap	2012	Jun	30	23:59:60	+	S
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Leap	2015	Jun	30	23:59:60	+	S
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Leap	2016	Dec	31	23:59:60	+	S
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# POSIX timestamps for the data in this file:
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#updated 1467936000
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#expires 1561680000
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#	Updated through IERS Bulletin C56
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#	File expires on:  28 June 2019