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                                  
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                                              Paris, 4 July 2005
                                                          
                                              Bulletin C 30
                               
                                              To authorities responsible
      for the measurement and
      distribution of time                                        


                                   UTC TIME STEP
                            on the 1st of January 2006
                     

 A positive leap second will be introduced at the end of December 2005.
 The sequence of dates of the UTC second markers will be:

                          2005 December 31,     23h 59m 59s
                          2005 December 31,     23h 59m 60s
                          2006 January   1,      0h  0m  0s
             
 The difference between UTC and the International Atomic Time TAI is:
 
  from 1999 January 1, 0h UTC, to 2006 January 1  0h UTC  : UTC-TAI = - 32s
  from 2006 January 1, 0h UTC, until further notice       : UTC-TAI = - 33s
 
 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

 

original text found on:

ftp://hpiers.obspm.fr/iers/bul/bulc/bulletinc.dat

 

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