Not A Second To Lose!

(... or gain, apparently.)

June 30th was like any other day. Maybe you noticed.



Paris, 09 January 2018


Bulletin C 55

To authorities responsible
for the measurement and
distribution of time



INFORMATION ON UTC - TAI


NO leap second will be introduced at the end of June 2018.
The difference between Coordinated Universal Time UTC and the
International Atomic Time TAI is :

from 2017 January 1, 0h UTC, until further notice : UTC-TAI = -37 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 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
Director
Earth Orientation Center of IERS
Observatoire de Paris, France