What Will Happen On Dec 2012?Last updated on June 21, 2009 By VenkatHey guys we have 3 years left to leave ?yes the the world may end on December 21st 2012 .Check the below movie trailer what happens on Dec 21 2012. 2012 Movie Trailer image credit:WikipediaRelated articlesEarth Hour 2009: Switch off your Lights today for one hour