Again looking through my system log with logread I found the following:

Dec 13 02:16:12 openzaurus user.notice root: Checking if Tue Nov 9 2004 is between Sat Dec 13 2003 and Sat Dec 27 2003 !

I have an all day event on the 27th, today is the 13th, and the 9/10/04 date has a repeating entry from earlier this year (started Tue 14/10/03).

I was just interested.