It should always be right to the computer because that is where it is getting the time.
I played with putting up the clock and then getting date and time from the control panel, you can make the clock read anything you want provided the year is not after 2010. It starts at 2004 and scrolls, so 2012 shows as 2005.
If you synchronize your computer with the internet, then it will agree with a GPS, which is where most times are referenced nowadays.
Sorry, got time on my hands today:cheeky1::cheeky1: no pun intended