[tz] A leap second after next June

[Denis Excoffier]

Hi,

Just received from IERS:

------------------------------------------------------------------------------
    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.iers at 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