Mercurial > hg > openjdk7.svn
view j2se/make/sun/javazic/tzdata/leapseconds @ 2:16f2b6c91171 trunk
[svn] Load openjdk/jdk7/b14 into jdk/trunk.
author | xiomara |
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date | Fri, 22 Jun 2007 00:46:43 +0000 |
parents | a4ed3fb96592 |
children | ce9dde984c21 |
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# # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. # # This code is free software; you can redistribute it and/or modify it # under the terms of the GNU General Public License version 2 only, as # published by the Free Software Foundation. Sun designates this # particular file as subject to the "Classpath" exception as provided # by Sun in the LICENSE file that accompanied this code. # # This code is distributed in the hope that it will be useful, but WITHOUT # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License # version 2 for more details (a copy is included in the LICENSE file that # accompanied this code). # # You should have received a copy of the GNU General Public License version # 2 along with this work; if not, write to the Free Software Foundation, # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. # # Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, # CA 95054 USA or visit www.sun.com if you need additional information or # have any questions. # # @(#)leapseconds 8.3 # 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. # 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. # The correction (+ or -) is made at the given time, so lines # will typically look like: # Leap YEAR MON DAY 23:59:60 + R/S # 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 # Leap YEAR MONTH DAY HH:MM:SS CORR R/S Leap 1972 Jun 30 23:59:60 + S Leap 1972 Dec 31 23:59:60 + S Leap 1973 Dec 31 23:59:60 + S Leap 1974 Dec 31 23:59:60 + S Leap 1975 Dec 31 23:59:60 + S Leap 1976 Dec 31 23:59:60 + S Leap 1977 Dec 31 23:59:60 + S Leap 1978 Dec 31 23:59:60 + S Leap 1979 Dec 31 23:59:60 + S Leap 1981 Jun 30 23:59:60 + S Leap 1982 Jun 30 23:59:60 + S Leap 1983 Jun 30 23:59:60 + S Leap 1985 Jun 30 23:59:60 + S Leap 1987 Dec 31 23:59:60 + S Leap 1989 Dec 31 23:59:60 + S Leap 1990 Dec 31 23:59:60 + S Leap 1992 Jun 30 23:59:60 + S Leap 1993 Jun 30 23:59:60 + S Leap 1994 Jun 30 23:59:60 + S Leap 1995 Dec 31 23:59:60 + S Leap 1997 Jun 30 23:59:60 + S Leap 1998 Dec 31 23:59:60 + S Leap 2005 Dec 31 23:59:60 + S # ... # Sent: Thursday, February 01, 2007 9:49 AM # ... # Subject: Bulletin C number 33 # # 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) # ... # # Paris, 1 February 2007 # Bulletin C 33 # To authorities responsible # for the measurement and # distribution of time # # INFORMATION ON UTC - TAI # # NO positive leap second will be introduced at the end of June 2007. # The difference between Coordinated Universal Time UTC and the # International Atomic Time TAI is: # from 2006 January 1, 0h UTC, until further notice : UTC-TAI = -33 s # 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 # Director # Earth Orientation Center of IERS # Observatoire de Paris, France