I just swapped out last year's calendar for this year's. I'm not a few days early: I've got a nifty four "page" calendar that runs in three month chunks from solstice to equinox, equinox to solstice, etc. The creator has a
stale flash blob of a website that gives a taste of it.
The whole thing would make a dandy teaching aid for explaining why we have seasons, the changes in visible constellations and planets, day/night balance, and so on. I think it gives a better feel for a year than a regular calendar. If any of you would like last year's to play with give me a shout.