The world is not going to end on December 21. No, not even according to the Mayan calendar. And especially not according to the awesome newly uncovered Mayan calendar -- the oldest known Mayan calendar in existence -- which was recently discovered by Boston University archeologist William Saturno.
What Saturno found turned out to be a well-persevered mural that includes the oldest known Mayan calendar to date. And just like the Maya Long Count calendar, which serves as the basis for the apocalypse myth, this calendar extends indefinitely into the future.
I'll see you at the end of the 17th Baktun (or not!). :P