Making an A3 Calendar

well for layout quark/indesign would be best in my opinion (think there may even be templates for a4 based ones there). What else would be needed depends on the type of calendar, a simple numbers plus big picture would require less than an arty type one with lots of swirls and extra bits added if you get what I mean.

the ones on iphoto are pretty cool

i just did this actually. i made single pages the size of each open calendar spread in InDesign; since it was a vertical calendar this is the only way i could make it make sense to work on without cranking my head sideways. had it been a horizontal calendar (which i wanted but the client did not) i would have laid it out like any other book.

the printer then did the imposition for me to get it printed and bound properly.

If you are using InDesign there is a great free script available for creating calendars.

http://www.adobe.com/cfusion/exchange/index.cfm?event=extensionDetail&loc=en_us&extid=1046667