News & Events

05. December 2016

Leap Second on December 31, 2016

The International Earth Rotation and Reference Systems Service (IERS) has announced the introduction of a leap second to occur at the end of December 2016.


Coordinated universal time (UTC) will sequence as follows:

31 Dec 2016 23 hours 59 minutes 59 seconds

31 Dec 2016 23 hours 59 minutes 60 seconds

01 Jan 2017 00 hours 00 minutes 00 seconds


Users are advised that the UTC data in the Galileo navigation message will change in accordance with OS SIS ICD (Section 5.1.7)


Before the leap second:

GST-UTC is 17 (GST is ahead of UTC by 17 seconds)


After the leap second:

GST-UTC will be 18 (GST will be ahead of UTC by 18 seconds)


Text source Earth Orientation Center of IERS, Observatoire de Paris, France