J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 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. Sun designates this |
| 7 | # particular file as subject to the "Classpath" exception as provided |
| 8 | # by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 21 | # CA 95054 USA or visit www.sun.com if you need additional information or |
| 22 | # have any questions. |
| 23 | # |
| 24 | |
| 25 | # Allowance for leapseconds added to each timezone file. |
| 26 | |
| 27 | # The International Earth Rotation Service periodically uses leap seconds |
| 28 | # to keep UTC to within 0.9 s of UT1 |
| 29 | # (which measures the true angular orientation of the earth in space); see |
| 30 | # Terry J Quinn, The BIPM and the accurate measure of time, |
| 31 | # Proc IEEE 79, 7 (July 1991), 894-905. |
| 32 | # There were no leap seconds before 1972, because the official mechanism |
| 33 | # accounting for the discrepancy between atomic time and the earth's rotation |
| 34 | # did not exist until the early 1970s. |
| 35 | |
| 36 | # The correction (+ or -) is made at the given time, so lines |
| 37 | # will typically look like: |
| 38 | # Leap YEAR MON DAY 23:59:60 + R/S |
| 39 | # or |
| 40 | # Leap YEAR MON DAY 23:59:59 - R/S |
| 41 | |
| 42 | # If the leapsecond is Rolling (R) the given time is local time |
| 43 | # If the leapsecond is Stationary (S) the given time is UTC |
| 44 | |
| 45 | # Leap YEAR MONTH DAY HH:MM:SS CORR R/S |
| 46 | Leap 1972 Jun 30 23:59:60 + S |
| 47 | Leap 1972 Dec 31 23:59:60 + S |
| 48 | Leap 1973 Dec 31 23:59:60 + S |
| 49 | Leap 1974 Dec 31 23:59:60 + S |
| 50 | Leap 1975 Dec 31 23:59:60 + S |
| 51 | Leap 1976 Dec 31 23:59:60 + S |
| 52 | Leap 1977 Dec 31 23:59:60 + S |
| 53 | Leap 1978 Dec 31 23:59:60 + S |
| 54 | Leap 1979 Dec 31 23:59:60 + S |
| 55 | Leap 1981 Jun 30 23:59:60 + S |
| 56 | Leap 1982 Jun 30 23:59:60 + S |
| 57 | Leap 1983 Jun 30 23:59:60 + S |
| 58 | Leap 1985 Jun 30 23:59:60 + S |
| 59 | Leap 1987 Dec 31 23:59:60 + S |
| 60 | Leap 1989 Dec 31 23:59:60 + S |
| 61 | Leap 1990 Dec 31 23:59:60 + S |
| 62 | Leap 1992 Jun 30 23:59:60 + S |
| 63 | Leap 1993 Jun 30 23:59:60 + S |
| 64 | Leap 1994 Jun 30 23:59:60 + S |
| 65 | Leap 1995 Dec 31 23:59:60 + S |
| 66 | Leap 1997 Jun 30 23:59:60 + S |
| 67 | Leap 1998 Dec 31 23:59:60 + S |
| 68 | Leap 2005 Dec 31 23:59:60 + S |
| 69 | |
| 70 | # INTERNATIONAL EARTH ROTATION AND REFERENCE SYSTEMS SERVICE (IERS) |
| 71 | # SERVICE INTERNATIONAL DE LA ROTATION TERRESTRE ET DES SYSTEMES DE REFERENCE |
| 72 | # |
| 73 | # SERVICE DE LA ROTATION TERRESTRE |
| 74 | # OBSERVATOIRE DE PARIS |
| 75 | # 61, Av. de l'Observatoire 75014 PARIS (France) |
| 76 | # Tel. : 33 (0) 1 40 51 22 26 |
| 77 | # FAX : 33 (0) 1 40 51 22 91 |
| 78 | # Internet : services.iers@obspm.fr |
| 79 | # |
| 80 | # Paris, 28 June 2007 |
| 81 | # |
| 82 | # Bulletin C 34 |
| 83 | # |
| 84 | # To authorities responsible |
| 85 | # for the measurement and |
| 86 | # distribution of time |
| 87 | # |
| 88 | # INFORMATION ON UTC - TAI |
| 89 | # |
| 90 | # NO positive leap second will be introduced at the end of December 2007. |
| 91 | # The difference between Coordinated Universal Time UTC and the |
| 92 | # International Atomic Time TAI is : |
| 93 | # |
| 94 | # from 2006 January 1, 0h UTC, until further notice : UTC-TAI = -33 s |
| 95 | # |
| 96 | # Leap seconds can be introduced in UTC at the end of the months of December |
| 97 | # or June, depending on the evolution of UT1-TAI. Bulletin C is mailed every |
| 98 | # six months, either to announce a time step in UTC, or to confirm that there |
| 99 | # will be no time step at the next possible date. |
| 100 | # |
| 101 | # Daniel GAMBIS |
| 102 | # Director |
| 103 | # Earth Orientation Center of IERS |
| 104 | # Observatoire de Paris, France |