Use one of these instead and save old years under mattress.
http://www.amazon.com/s/?ie=UTF8&keywords=fireman+calendar+2009&tag=googhydr-20&index=aps&hvadid=3134637561&ref=pd_sl_14ceaw954d_e
And, somehow, mine were never THAT entertaining.
But if I can't figure out why this calendar erased itself, it's back to the old method.