I personally don't directly believe it will happen. What I believe is that ANYTHING can happen at ANY time. The world could end tomorrow for all we know - we can't predict the future. So it's a 50/50 chance.
And whether we like it or not a lot of **** will happen that day - end of the world or not. Some crazy believers WILL commit suicide, there probably will be looting in big cities, and let's admit it, everyone will be somewhat scared/anxious. That day it's supposed to happen will be that last day before winter break at my school. People will probably be paranoid.