September, 11th = World Trade Center Crash
January, 11th = Haiti Earthquake
March, 11th = Japan Earthquake
12/21/2012 When the world will end -> 1 + 2 + 2 + 1 + 2 + 0 + 1 + 2 = 11

USA lost many lives on 9-11-01 and now Japan has lost more lives on 3-10-11. Add the 2 dates together and you get 12-21-12. (9-11-01 + 3-10-11. =12-21-12.)