Sharepoint - Why is central admin time different from server time?
In 2010 Go to http://centraladminsite/_layouts/regionalsetng.aspx and change in there. This is hidden by default, but is part of the standard regional site settings.
You can change the Central Admin Time Zone from here:
Central Admin -> Application Management -> Manage Web Applications -> SharePoint Central Administration v4 (The Central Admin Web Application) -> General Settings -> Default Time Zone