> 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 : (E-Mail Removed)
> 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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