The apocalypse almost happens pretty much every day, and occasionally multiple times in different locations. Fortunately, there's always a hero in the right place at the right time to stop the world from ending at the last possible second. Indeed, in some particularly exciting locales apocalypse-stopping can be a full-time employment.
But hey, so long as the world never knows how close it keeps getting to utter destruction, everything is just fine. Business as usual, as it were. And my guess is that when the 2012 apocalypse happens, everybody is going to wonder why it didn't.