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    Leap Second Announcement
    From: Sean C
    Date: 2016 Jul 6, 03:18 -0700

    From Paris:

        INTERNATIONAL EARTH ROTATION AND REFERENCE SYSTEMS SERVICE (IERS)

    SERVICE INTERNATIONAL DE LA ROTATION TERRESTRE ET DES SYSTEMES DE REFERENCE

    SERVICE DE LA ROTATION TERRESTRE DE L'IERS
    OBSERVATOIRE DE PARIS
    61, Av. de l'Observatoire 75014 PARIS (France)
    Tel.      : +33 1 40 51 23 35
    e-mail    : services{dot}iers{at}obspm{dot}fr
    http://hpiers.obspm.fr/eop-pc


                                                  Paris, 6 July 2016

                                                  Bulletin C 52

     To authorities responsible for the measurement and distribution of time


                                       UTC TIME STEP
                                on the 1st of January 2017


     A positive leap second will be introduced at the end of December 2016.
     The sequence of dates of the UTC second markers will be:

                              2016 December 31, 23h 59m 59s
                              2016 December 31, 23h 59m 60s
                              2017 January   1,  0h  0m  0s

     The difference between UTC and the International Atomic Time TAI is:

      from 2015 July 1, 0h UTC, to 2017 January 1 0h UTC   : UTC-TAI = - 36s
      from 2017 January 1, 0h UTC, until further notice    : UTC-TAI = - 37s



     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.


                                                  Christian Bizouard
                                                  Head
                                                  Earth Orientation Center of IERS
                                                  Observatoire de Paris, France

    Regards,

    Sean C.

       
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