Even launchpad is showing this: Asia/Ulaanbaatar (UTC+0900) -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to tzdata in Ubuntu. https://bugs.launchpad.net/bugs/1691092
Title: outdated timezone information for Mongolia Status in tzdata package in Ubuntu: Confirmed Bug description: Mongolia stopped following DST this year. The timezone information in Ubuntu 16.04.2 LTS is outdated: $ TZ=Asia/Ulaanbaatar date --date="2017-05-16 12:15 UTC" +%H:%M 21:15 The correct output is '20:15'.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. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/tzdata/+bug/1691092/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp