God damn, consider these points:
-The Mayans may have been great astronomers, but they're an insanely old civilization. We know more than they did now.
-They wrote on rocks.
-Maybe it's just me, but when I'm done with a calander, I just go to the next one.
-Why 2012? Why not 2013? Why not even a more simple number, like, maybe, 2000?
-If they managed to all get killed off, can you really trust in their intellegince?