Programmatically setting a user's timezone ("My Regional Settings")

(I cross posted this into General)

I'm working on a large, global extranet. Since the site features a lot of calendar data, it's crucial that we have all of our users set in the correct timezone. Two questions:

1. Does sharepoint automatically grab timezone information from active directory?

2. Can I programmatically set a user's timezone (my app is dual-zoned with a large percentage of users not in active directory but rather in SQL)? If so, if someone could point me to the proper namespace and maybe even provide a code snippet it would be very much appreciated.

Thanks!

Allan

UPDATE: I've done some more research and have foundSPUser.RegionalSettingsbut, from what I can tell,RegionalSettingshas no properties fot time zone.

[933 byte] By [AllanWellenstein] at [2008-1-1]