1# @(#)leapseconds 8.3
2
3# Allowance for leapseconds added to each timezone file.
4
5# The International Earth Rotation Service periodically uses leap seconds
6# to keep UTC to within 0.9 s of UT1
7# (which measures the true angular orientation of the earth in space); see
8# Terry J Quinn, The BIPM and the accurate measure of time,
9# Proc IEEE 79, 7 (July 1991), 894-905.

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40Leap 1992 Jun 30 23:59:60 + S
41Leap 1993 Jun 30 23:59:60 + S
42Leap 1994 Jun 30 23:59:60 + S
43Leap 1995 Dec 31 23:59:60 + S
44Leap 1997 Jun 30 23:59:60 + S
45Leap 1998 Dec 31 23:59:60 + S
46Leap 2005 Dec 31 23:59:60 + S
47
48# ...
49# Date: Thu, 28 Jun 2007 14:36:55 +0200
50# Message-Id: <200706281236.l5SCatpA020400@callisto.obspm.fr>
51# ...
52# Subject: Bulletin C number 34
53# ...
54# INTERNATIONAL EARTH ROTATION AND REFERENCE SYSTEMS SERVICE (IERS)
55#
56# SERVICE INTERNATIONAL DE LA ROTATION TERRESTRE ET DES SYSTEMES DE REFERENCE
57#
58# SERVICE DE LA ROTATION TERRESTRE
59# OBSERVATOIRE DE PARIS
60# 61, Av. de l'Observatoire 75014 PARIS (France)
61# ...
62#
63# Paris, 28 June 2007
64# Bulletin C 34
65# To authorities responsible
66# for the measurement and
67# distribution of time
68#
69# INFORMATION ON UTC - TAI
70#
71# NO positive leap second will be introduced at the end of December 2007.
72# The difference between Coordinated Universal Time UTC and the
73# International Atomic Time TAI is:
74# from 2006 January 1, 0h UTC, until further notice : UTC-TAI = -33 s
75# Leap seconds can be introduced in UTC at the end of the months of
76# December or June, depending on the evolution of UT1-TAI. Bulletin C is
77# mailed every six months, either to announce a time step in UTC, or to
78# confirm that there will be no time step at the next possible date.
79#
80# Daniel GAMBIS
81# Director
82# Earth Orientation Center of IERS
83# Observatoire de Paris, France