Public bug reported: Mongolia stopped following DST this year. The timezone information in Ubuntu 16.04.2 LTS is outdated:
$ TZ=Asia/Ulaanbaatar date --date="2017-05-16 12:15 UTC" +%H:%M 21:15 The correct output is '20:15'. This has been updated in version 2017a of tzdata. My Ubuntu 16.04 is using 2016j. I guess the previous LTS versions are also affected. ** Affects: tzdata (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1691092 Title: outdated timezone information for Mongolia To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/tzdata/+bug/1691092/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs