Why the world did not end yesterday

Over at Lightyears.blogs.cnn they have this very interesting feature about the prophecy, I guess you are aware, concerning the world ending on the 21st December, 2012.

In case you are convinced it is ending on that date, please make a donation in my name to any charity of your choice and the rest of your estate you could leave to me to manage as I please since am hoping to be here for quite sometime, that is if mother nature with all its justice and injustice spares and the Grim Reaper gives me a wide berth.