I'm not really sure myself because people predicted several times but it never happened. Having said this, I don't think anyone really knows the exact date. There's still about 5-6 months left to think about it...
The mayans didn't predict the end of the world, we're just trying to figure out their writings and stuff, and we're failing horribly. Calenders can't go on forever or somebody would need to constantly be writing it >.>
Just kidding lol. But P.S. We were talking about it with my dad (around the dinner table you know :) ) and he was like, if the world is supposed to end tomorrow, it already is tomorrow on the other side of the world 0-0 Wonder what's going on there.
There are only 10 types of people in the world, those who know binary and those who don't.