Well actually, you cant go by either the "Sumerian" or Traditional greek calendar as the 2 dont actually line up in and significant way.
We know the Rotation of Niburu / Planet X and that is all we know. Scientists still have not perfected Carbon dating or any other kind of dating technique and as we all know science is all theory really.
So ... 2003, 2012, 2010, makes no difference.
Is it approaching YES will it cause chaos to the earths gravitation YES. Will we probably die cause of it ... probably....
So ... lets not worry about it, Put on another Nevermore CD pop open a cold one and take a front row seat to the end of the world....
As Steve Buschemi said in Armageddon.... IM JUST TRYING TO HAVE A LITTLE FUN BEFORE I DIE !!!!