NO they have already said that the calender is off by as much as 50-100 years....so it should have either already ended or we still have pleanty of time. Was a article linked from yahoo on it a week or so ago.
Was the year 2000 the end of the world? No. We all want this end of the world shit to go down and conspiracy shit sells books, survival kits, lets the con men prey on the fools.