W.r.t timezone update for Asia/Choibalsan

[Chenthill]

Hi,
  I am currently updating the timezones for evolution (default mail
client for many linux distros) . I have a
small doubt with updating timezone for the location Asia/Choibalsan. I
see that the offset is +09000 from the olson timezone database
(ftp://elsie.nci.nih.gov/pub/) for the standard timezone, but
timeanddate.com
(http://timeanddate.com/worldclock/results.html?query=Choibalsan),
http://www.travelpost.com/AS/Mongolia/Dornod/Choibalsan/7449157  and
http://www.timeinside.com/view.jsp?region=Asia&country=Mongolia&city=Choibalsan  show its +08000 for Choibalsan. Please let me know
which would be the right offset for Asia/Choibalsan.

thanks in advance, Chenthill.