Why is 9/11 a significant date? Is it because a relatively small amount of people (in terms of natural disasters) died? You DO realize that the rest of the world could give less of a fuck about 9/11, right? If the WORLD comes to an end, not just Dumbfuckistan, you'll have to add up every single significant world-related catastrophe and see if the dates add up to correspond with the 12/21/12.
Speaking of which, that date is a myth. The mayan calendar says nothing about apocalypse on that day. It simply ends, and any rational person could infer that the calendar simply starts again, sort of like our OWN calendar.