yeah i should have thought like you did about end-user timezone isntead of server timezone.
i did a bit of research, and there's a lot of places that are on half hour differences many near indea and the mideast....Nepal is actually off by 15 minutes from it's neighbor Bangladesh.
Iran, India, some parts of Australia, Newfoundland and more are off by half hours:
http://geography.about.com/od/culturalgeography/a/offsettimezones.htm
Lowell