Do you really think the Mayans knew when the end of the world was? They supposedly just found out that they have misinterpreted what the Mayanas said all along. It was supposed to be the end of an era, not the world 
Listen the fucking mayans thought the world was held up by four palm trees of different colors, so forgive me i laugh at this petty civilization and the idiots who think because they solved fucking simple architecture, they know more then us today with string theory and chaos theory, robots, space travel ETC.....
they were stupid cavemen, they offered nothing impressive, its only impressive if you think of them as retards trying to figure out a puzzle. If i were living back then or you, im sure you could surmise more then them. Our society is 1million percent more advanced yet we can't predict the future, but they can? perhaps it is four different colored trees.
LOL.