But it still raises the question of how far the calendar we use today goes. It's simply a question of how lazy the person is, and how far ahead they decide to figure out the dates for. Computers kind of make it irrelevant for us, because we can go any number of years into the future, it doesn't even matter. But back then, they had to stop counting somewhere, you know? To believe that they actually CHOSE a specific date to stop because it was the end of the world, as opposed to just stopping because "eh, that's like 2000 years into the future, that's far enough for now" is pretty gullible. The fact that the Mayan calendar is even older only supports my point.
Then again, I don't have all the information, this isn't really my subject. But still.