The 2016c release of the tz code and data is available. Its most urgent change is for Asia/Baku, where the update takes effect this weekend. This release reflects the following changes, which were either circulated on the tz mailing list or are relatively minor technical or administrative changes: Changes affecting future time stamps Azerbaijan no longer observes DST. Chile reverts from permanent to seasonal DST. Guess that future transitions are August's and May's second Saturdays at 24:00 mainland time. Also, call the period from 2014-09-07 through 2016-05-14 daylight saving time instead of standard time, as that seems more appropriate now. Changes affecting past time stamps Europe/Kaliningrad and Europe/Vilnius changed from +03/+04 to +02/+03 on 1989-03-26, not 1991-03-31. Europe/Volgograd changed from +04/+05 to +03/+04 on 1988-03-27, not 1989-03-26. Changes to commentary Several updates and URLs for historical and proposed Russian changes.