A question regarding the 'Mayan Calendar End of the World' idiocy.
Since this prediction was made, the Western calendar has changed several times. How did people come up with the date December 21, 2012?
What will the excuse be when December 22 dawns?
As others have said, the long count calendar can, with some accuracy, be correlated with astronomical observances that can align it with the western calendar in its current state.
As for the excuses? I expect a major one will be that this is the start
of a new era, not the end of the world, and why did we think they were saying the world would end? No, of course, that's not what they meant. Oh, look, a puppy!