well actually the difference is 17 months, The addition of one day every four years for roughly 3,812 years, which does not apply to the Mayan calendar, adds up to around 953 extra days, which is around 31 extra Months or 2.6 years ( about 2 years, 7 Months ), today is March 21st 2012 according to the current calender, by my calculations it can be estimated that today, according to the Mayan Calender, which has no leap year, is around October-November 2014 (give or take a few days), the Apocalypse was 2 years and 7 months ago. Congrats everyone, we survived 2012!