IERS Bulletin C 72: No new leap second

[ChristopherRabotin]

                                       Paris, 06 July 2026


                                          Bulletin C 72

                                          To authorities responsible
                                          for the measurement and
                                          distribution of time



                      INFORMATION ON UTC - TAI

NO leap second will be introduced at the end of December 2026.
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.