There is a bug in the live clock script in this page Live Clock.

The Clock displays 12 AM at noon when it must have been 12 PM.
This can be corrected by changing the following line of code
if (hours > 12) { dn = "PM"; hours = hours - 12; }

Change the 12 to 11, ie.
if (hours > 11) { dn = "PM"; hours = hours - 12; }

thanx