Well, I think it's a bunch of crap.
Think about it; the Mayans just disappeared. No one knows why, and yet they had this guy working on a calendar that lasted for hundreds of years beyond their civilization's true existence. The end of the world is just as likely as the calendar making calling in sick the day the rest of the empire fell. 12-21 is the last day because that's just as far as he got.
Still, it would be nice to think I coud be zombie hunting in only two weeks. Finally get that ex-wife out of my misery.
Papa