Deborah Goldsmith wrote:
We received a bug report claiming that the tz database UTC offset for Asia/Choibalsan (GMT+09:00) is incorrect, and that it should be GMT+08:00 instead. Different sources appear to disagree with the tz database on this, e.g.:
http://www.timeanddate.com/worldclock/city.html?n=1026 http://www.worldtimeserver.com/current_time_in_MN.aspx
both say GMT+08:00.
Do we have any independent confirmation of the correct offset for Asia/Choibalsan? Several reporters in the past on this mailing list have also reported GMT+8. For instance, eznis airways, which operates several domestic flights, has a flight schedule here: http://www.eznis.com/Container.jsp?id=112 (click the English flag for English)
There it appears that flights between Choibalsan and Ulaanbatar arrive about 1:35 - 1:50 hours later in local clock time, no matter the direction, while Ulaanbaatar-Khvod takes 2 hours in the Eastern direction and 3:35 back, which indicates that Ulaanbatar and Khvod are in different time zones (like we know about), while Choibalsan and Ulaanbatar are in the same time zone (correction needed). Best regards, Steffen Thorsen / timeanddate.com