The rumored belief is that the world is going to end in 2012. This rumor is believed to be true as of the Mayan calendars. However, the Mayan calendar does not include leap year. Because of this fact the rumored "end of the world date" has technically already passed.
There are a lot of big events that will happen in the year 2012. There is an election for the US President in November. Some people speculate that the world will end in December, but that's just a myth.