Time in Mongolia is officially represented by the Mongolian Standard Time (). However, the far western provinces of Khovd, Uvs and Bayan-ÃÂlgii use .
Mongolia used daylight saving time in 1983âÂÂ1998, 2001âÂÂ2006 and 2015âÂÂ2016. However, Mongolia observes time almost exactly an hour ahead of its geographical time zone, with its border between UTC+7 and UTC+8 being almost exactly the longitudinal line of 97.5ð E(which is really the designated border for between UTC+7 and UTC+6), so all of Mongolia could be said to be on permanent daylight/summer time.
The IANA time zone database contains two zones for Mongolia in the file zone.tab.