Description: IAU Commission 4 - Ephemerides web site
iau (23) ephemerides (13) commission 4 (1)
There will be a leap second at the end of June.
The Commission 4 report for the IAU Transaction for GA 2015 entitled Historical Reflections is available as arXiv paper number 1511.01546.
A link to the page with the Report of the IAU Working Group on UTC.