Good point Woodsman. It is important that you set the timezone correctly and a good idea to manually set the clock before setting up something automatic.
Code:
ntpdate pool.ntp.org
will get your clock synced once the TimeZone is correct.
If you have lots of servers then you should really set up one that syncs to an outside source and set all the others to sync from that.
I guess a HowTo on setting up NTP would be useful... I'll put it on my ToDo list.