Been working on this for my swfBB Flash Based Bulletin Board and thought I would put it up on here for people to see as its hard to find a decent calendar example these days. Its not quite finished yet but I could provide some source for it if needed if im not too busy. You can navigate through months using the previous and next buttons.
http://www.swfbb.com/calendar/calendar.html
Phil
EDIT: Forgot to add this is published in Flash 8 format so you will need to new player to view it 