IIGS clock wrong day of week/right month/day?

[Jack Countryman <jcountry@seidata.com>]

I was tikering with a IIGS Thursday...and among other things it was
complaininng (or at least the program they were trying to run was
complaining) about the clock being set wrong.  Sure enough, it was.  So,
since it was a ROM 3, I went scavenging and got a battery from an unused
LC to get the IIGS going.  It worked...at the time.  

However, when we started the program back up, while the month/day were
right, the day of the week was off by one day (it reported 3/9/00 to be
Wednesday instead of Thursday).  Anyone know off hand if this is a
problem in the program or in the IIGS clock routine?  Does the clock
generate the day of the week or is that done in the program?

Anyone else notice the day being reported wrong on their IIGS lately?