According to the mayan calendar, they believed that their world would end on
the mayan calander was one of the most up to date 1400's. this is an over look at how the mayans calander was set up.
Number of Days / Term
1 / Kin (day)
20 / Uinal
360 / Tun
7200 / Katun
144000 / Baktun
Notice that the only exception to multiplying by twenty is at the tun level, where the uinal period is instead multiplied by 18 to make the 360-day tun. The Maya used this counting system to track an unbroken sequence of days from the time it was thought of. The Mayan scholar Munro Edmonson believes that the Long Count was put in place around 355 B.C. This may be so, but the oldest Long Count date as yet found corresponds to 32 B.C..
this whole thory was created by alfred percival muldslay in the late 1880's
pictures from
http://www.levity.com/eschaton/Why2012.html
http://archive.cyark.org/sites.php?v=media&p=tik&gclid=CP-yo-a6npECFRYsIgodcWDOtw
information from
http://www.levity.com/eschaton/Why2012.html