It's not the end of the World

I fail to see why would 21.12gmt on 21st December 2012 be decreed by apprarently those in the know as the end of the world?

One of the Mayan calenders finishes it cycle on the solstice. So what?

Their number system was different to ours. I bet there was not a thought made by the Mayans of the concept of our date and time or what it looked like as a palindrome.