This is what I got from the U.S. Embassy in Ulaanbaatar:

 

All of Mongolia is on one time zone. It is 13 hours ahead of Washington, D.C. or +8 GMT. Mongolia does observe daylight savings time. Ulaanbaatar (and Irkukst, Russia) share a time zone entry, with daylight savings time option, on Windows XP.

 

 

 

From: Risto Nykänen [mailto:ristonykanen@luukku.com]
Sent: Monday, May 16, 2005 5:38 PM
To: Contacts@abdicate.net
Subject: Mongolia has two time zones GMT +7 and GMT +8 (DST GMT +8 and DST GMT +9)

 

 

 

See next link:

 

 

 

 

 

Risto

 

P.S. GMT +9 (DST GMT +10) not anylonger in use.