Per the reckoning of a group of scientists being reported in a Dutch journal (link goes to English translation) the popularly-held belief that the Maya calendar predicts the destruction of the world in 2012 is a miscalculation and doesn't even have anything to do with the end times whatsoever. The real end of the Maya cycle of time, according to what these researchers have found, is around 2220... and then the calendar just goes back to the beginning, even as ours ends on December 31st and goes into January 1st.
So like Lt. Commander Susan Ivanova of Babylon 5 once said: "No boom today. Boom tomorrow. There is always boom tomorrow."
(But if this kind of thing floats your boat, we've still got Sir Isaac Newton's prediction of a 2060 apocalypse looming before us :-)