05-08-2010 08:54 PM
The clock uses the network time set by the 3G network, but you can change your time zone. Go to Settings->Display and scroll down and you will see the time zone settings.
05-09-2010 09:40 AM
Note also that with 1.3 most cases now will correctly change to your local time zone. This was not working correctly for some in 1.2. Only exceptions seems to be in some areas where the local time servers are wrong or perhaps located in a zone different than yours (those located near the edge of a time zone).
05-19-2010 04:08 PM
I had similar problem. CS said there was nothing I could do, it was an ATT issue. When I accidently changed the time to military time and went back to standard time,it reset to the correct time by itself.