I hadn't seen the other calenders.. they are very cute and very funny, only suggestion i think I could make is to use the actual days of the week, honestly, the way my brain works (or doesn't) I'd get all screwed up with that calender having the funny names..

Otherwise it looks cool.. maybe if you don't want to base it off food you could try to find some dinosaur holidays.. if there are any? Or make some up.. along with the food stuff? Or just and old silly holidays.. there are sooo many of them!
How do you pick the photos for the calenders, are they only of your pictures of bob or are they of submitted photos by the folks here also?
I can't wait to get one, sounds like fun!
- Sarah