[Zope] ZopeTime not synchronized with server

I'm running Zope on a server that is showning the correct date/time. However, when I have Zope write a date, after 5:00 pm, it shows tomorrow's date. It is as though Zope were on GMT and not taking the time from the server. Is there a way to reset Zope to the correct time, or have it take time directly from the server? Thanks in advance for any help. Ron