1 # 2 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 # 4 # This code is free software; you can redistribute it and/or modify it 5 # under the terms of the GNU General Public License version 2 only, as 6 # published by the Free Software Foundation. Oracle designates this 7 # particular file as subject to the "Classpath" exception as provided 8 # by Oracle in the LICENSE file that accompanied this code. 9 # 10 # This code is distributed in the hope that it will be useful, but WITHOUT 11 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 # version 2 for more details (a copy is included in the LICENSE file that 14 # accompanied this code). 15 # 16 # You should have received a copy of the GNU General Public License version 17 # 2 along with this work; if not, write to the Free Software Foundation, 18 # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 # 20 # Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 # or visit www.oracle.com if you need additional information or have any 22 # questions. 23 # 24 # <pre> 25 # This file is in the public domain, so clarified as of 26 # 2009-05-17 by Arthur David Olson. 27 28 # Allowance for leapseconds added to each timezone file. 29 30 # The International Earth Rotation Service periodically uses leap seconds 31 # to keep UTC to within 0.9 s of UT1 32 # (which measures the true angular orientation of the earth in space); see 33 # Terry J Quinn, The BIPM and the accurate measure of time, 34 # Proc IEEE 79, 7 (July 1991), 894-905. 35 # There were no leap seconds before 1972, because the official mechanism 36 # accounting for the discrepancy between atomic time and the earth's rotation 37 # did not exist until the early 1970s. 38 39 # The correction (+ or -) is made at the given time, so lines 40 # will typically look like: 41 # Leap YEAR MON DAY 23:59:60 + R/S 42 # or 43 # Leap YEAR MON DAY 23:59:59 - R/S 44 45 # If the leapsecond is Rolling (R) the given time is local time 46 # If the leapsecond is Stationary (S) the given time is UTC 47 48 # Leap YEAR MONTH DAY HH:MM:SS CORR R/S 49 Leap 1972 Jun 30 23:59:60 + S 50 Leap 1972 Dec 31 23:59:60 + S 51 Leap 1973 Dec 31 23:59:60 + S 52 Leap 1974 Dec 31 23:59:60 + S 53 Leap 1975 Dec 31 23:59:60 + S 54 Leap 1976 Dec 31 23:59:60 + S 55 Leap 1977 Dec 31 23:59:60 + S 56 Leap 1978 Dec 31 23:59:60 + S 57 Leap 1979 Dec 31 23:59:60 + S 58 Leap 1981 Jun 30 23:59:60 + S 59 Leap 1982 Jun 30 23:59:60 + S 60 Leap 1983 Jun 30 23:59:60 + S 61 Leap 1985 Jun 30 23:59:60 + S 62 Leap 1987 Dec 31 23:59:60 + S 63 Leap 1989 Dec 31 23:59:60 + S 64 Leap 1990 Dec 31 23:59:60 + S 65 Leap 1992 Jun 30 23:59:60 + S 66 Leap 1993 Jun 30 23:59:60 + S 67 Leap 1994 Jun 30 23:59:60 + S 68 Leap 1995 Dec 31 23:59:60 + S 69 Leap 1997 Jun 30 23:59:60 + S 70 Leap 1998 Dec 31 23:59:60 + S 71 Leap 2005 Dec 31 23:59:60 + S 72 Leap 2008 Dec 31 23:59:60 + S 73 Leap 2012 Jun 30 23:59:60 + S 74 75 # INTERNATIONAL EARTH ROTATION AND REFERENCE SYSTEMS SERVICE (IERS) 76 # 77 # SERVICE INTERNATIONAL DE LA ROTATION TERRESTRE ET DES SYSTEMES DE REFERENCE 78 # 79 # 80 # SERVICE DE LA ROTATION TERRESTRE 81 # OBSERVATOIRE DE PARIS 82 # 61, Av. de l'Observatoire 75014 PARIS (France) 83 # Tel. : 33 (0) 1 40 51 22 26 84 # FAX : 33 (0) 1 40 51 22 91 85 # e-mail : (E-Mail Removed) 86 # http://hpiers.obspm.fr/eop-pc 87 # 88 # Paris, 5 January 2012 89 # 90 # 91 # Bulletin C 43 92 # 93 # To authorities responsible 94 # for the measurement and 95 # distribution of time 96 # 97 # 98 # UTC TIME STEP 99 # on the 1st of July 2012 100 # 101 # 102 # A positive leap second will be introduced at the end of June 2012. 103 # The sequence of dates of the UTC second markers will be: 104 # 105 # 2012 June 30, 23h 59m 59s 106 # 2012 June 30, 23h 59m 60s 107 # 2012 July 1, 0h 0m 0s 108 # 109 # The difference between UTC and the International Atomic Time TAI is: 110 # 111 # from 2009 January 1, 0h UTC, to 2012 July 1 0h UTC : UTC-TAI = - 34s 112 # from 2012 July 1, 0h UTC, until further notice : UTC-TAI = - 35s 113 # 114 # Leap seconds can be introduced in UTC at the end of the months of December 115 # or June, depending on the evolution of UT1-TAI. Bulletin C is mailed every 116 # six months, either to announce a time step in UTC or to confirm that there 117 # will be no time step at the next possible date. 118 # 119 # 120 # Daniel GAMBIS 121 # Head 122 # Earth Orientation Center of IERS 123 # Observatoire de Paris, France