-----------------------------------------------------------------------------------------------
please ignore the first bulletin C 10
-----------------------------------------------------------------------------------------------








INTERNATIONAL EARTH ROTATION SERVICE (IERS)
SERVICE INTERNATIONAL DE LA ROTATION TERRESTRE






BUREAU CENTRAL DE L'IERS
OBSERVATOIRE DE PARIS                                   Paris, 3 July 1995
61, Av. de l'Observatoire 75014 PARIS (France)
Tel. (33) 1-40 51 22 26      Telex : 270776 OBS
Internet      : services@obspm.fr
Span          : MESIOA::SERVICES
FAX           : (33) 1 - 40 51 22 32
Bulletin C 10




To authorities responsible for
the measurement and distribution
of time












UTC TIME STEP
on the 1st of January 1996








A positive leap second will be introduced at the end of December 1995.
The sequence of dates of the UTC second markers will be:


1995 December 31,     23h 59m 59s
1995 December 31,     23h 59m 60s
1996 January   1,      0h  0m  0s




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


from 1994 July 1, 0h UTC, to 1996 January 1, 0h UTC    : UTC-TAI = - 29 s
from 1996 January 1, 0h UTC, until further notice      : UTC-TAI = - 30 s




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 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.








Martine FEISSEL
Director
Central Bureau of IERS