This recommended update for timezone provides version 2015a with the following fixes and enhancements:
- New positive leap second 2015-06-30 23:59:60 UTC as per IERS Bulletin C 49 (boo#914676)
- Mexico state Quintana Roo (America/Cancun) shift from Central Time with DST to Eastern Time without DST on 2015-02-01 02:00.
- Chile (America/Santiago) will retain old DST as standard time from April, also Pacific/Easter, and Antarctica/Palmer
- Changes affecting past timestamps (Iceland 1837 through 1939)
- Some more zones have been turned into links (pre-1970)