No it's supposed to be 21st December 2012. To be honest you don't really know if it will. Nostradamus and the Mayans(people that could not have met) and also note that Nostradumas predicted 9/11, the Holocaust and a conflict between Israel and Iran.
The Mayan calender ended in 2012. That does not say that the world will end in 2012 does it?
It could mean that the world as we know it will end, bringing with it a new era of some sort.
I've said this before and I'm going to say it again; there have been numerous "doomsday" dates predicted, yet we're still here to tell the tale.
Seriously, I wouldn't waste time in worrying about this whole 2012 thing.
Well my opinion on the matter is just live your life until 2012 actually comes and we'll see what happens then. If the world ends then the world ends, if the world undergoes some sort of spiritual transformation then we'll see what happens. Have you ever heard the saying "yesterday is history, tomorrow is a mystery but today is a gift. That's why they call it the present"? Basically 2012 is a mystery so we should just enjoy the gift of the present rather than worry about the myseries of 2012.
I have my own theory: a comet will crash into the moon and all the moon worshipers will get special powers and some of them will turn evil and the world will explode. Some of us are going to live on the sun. Voila