There will be a leap second the end of June 2012.
John WA4WDL
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From: "IERS EOP Product Center" <services.i...@obspm.fr>
Sent: Thursday, January 05, 2012 9:16 AM
To: <bulc.i...@obspm.fr>
Subject: Bulletin C number 43
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)
Tel. : 33 (0) 1 40 51 22 26
FAX : 33 (0) 1 40 51 22 91
e-mail : services.i...@obspm.fr
http://hpiers.obspm.fr/eop-pc
Paris, 5 January 2012
Bulletin C 43
To authorities responsible
for the measurement and
distribution of time
UTC TIME STEP
on the 1st of July 2012
A positive leap second will be introduced at the end of June 2012.
The sequence of dates of the UTC second markers will be:
2012 June 30, 23h 59m 59s
2012 June 30, 23h 59m 60s
2012 July 1, 0h 0m 0s
The difference between UTC and the International Atomic Time TAI is:
from 2009 January 1, 0h UTC, to 2012 July 1 0h UTC : UTC-TAI = - 34s
from 2012 July 1, 0h UTC, until further notice : UTC-TAI = - 35s
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
Head
Earth Orientation Center of
IERS
Observatoire de Paris, France
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