User blog comment:SBCA/Notice: To All Users of the SpongeBob Fan Wiki/@comment-4885320-20150331094723/@comment-4885320-20150331114021

As per the clock's original developer:  

No, sorry, the timezone isn't configurable. The purpose of this widget is to see the  server time. It's aimed at making it easy to check the time in signatures on Talk pages relative to the current time, anonymous editors also see all times in UTC so it's very helpful when trying to make sense of History and Recent Changes, and it's also useful for Wikis with the achievement system active; since whenever achievements say "days", they mean UTC  00:00->23:59  is one day. UTC is also standard for coordinating an event with people across multiple timezones. It's kind of pointless otherwise since you should have a clock in local time on your computer's UI already (taskbar [Windows] / top menu bar [Mac] / "Charms" bar ["Windows" 8]). Lunarity03:42, March 4, 2013 (UTC)