The Mayan Calendar
The Mayan calendar has a starting sate of August 13th, 3114 BC which corresponds to their moment of the fourth creation, the one in which we currently live.
The Mayan calendar is a fascinating combination of mapping the solar year and integrating it with their mathematics and their religious system. The calendar was originated by the Toltecs and was adopted and improved upon by the Maya. The Maya began counting from their year "0" which corresponds to our date of 3113 BC and all dates correspond to this date as the starting point. This is the same rationalle as our calendar starting our year "0" from the birth of a religious leader and the count moving foreward from that point. .
The Maya used two methods to track the passing of time. The Calendar Round and the Long Count. First we will examine the Long Count. The use of the long count brackets the Classic period as this was only utilized and practiced by the Classic Maya. This format is called the Mayan Long Count and breaks down as follows:
1 Baktun (20 Katuns) 144,000 days
1 Katun (20 Tuns) 7,200 days
1 Tun (18 Uinals) 360 days
1 Uinal (20 Kin) 20 days
1 Kin (1 day) 1 day
Dates were indicated in decreasing amounts starting with Baktuns. So an inscribed date of 9.16.6.0.5 translates thusly:
9 Baktuns = 1,296,000 days
16 Katuns = 115,200 days
6 Tuns = 2160 days
0 Uinals = 0 days days
5 Kin = 5 days
Total = 1,413,365 days. Divided by 365.25 (an accurate solar year) = 3869.6 years AFTER 3113 BC, the start of time in this creation according to Maya mythology. Our date for this would then be about mid way through the year 756 BC.
The earliest recorded Maya date is found on Stellae 29 in Tikal, reading 8.12.14.8.15 and would then mean:
8 Baktun 1,152,000 days
12 Katuns 86400 days
14 Tuns 5040 days
8 Uinals 160 days
15 Kin 15 days
Total = 1,243,615 Days. Divided by 365.25 = 3404.8 years after 3113 BC, or roughly near the end of the year 291 AD.
Last recorded inscribed date using the long count from the Classic period was found on the Jadeite Gorget found in Quintana Roo, that date is 10.4.0.0.0. 10 Baktuns (1,440,000 days) plus 4 Katuns (28,800 days) = 1,468,800 days. 4021 years or the modern year 908 AD. For archeologists this also marks the end of the classic period.
The above information is from: http://www.isourcecom.com/maya/themaya/calendar.htm