The calendar Imagery among the Maya is so prominent that some experts believe that they had an obsessive fascination with time rivaling that of present –day humans. They used two calendar systems, the Long Count Calendar and The Calendar round. The Long Count was perfected in Classical times that are AD 250-900, and its dates record the number of days that have elapsed since a mythological starting point corresponding to 3114 BC in our calendar. In fact the Maya believed that the world had been created and destroyed at least three times, the last creations having begun on August 13, 3114 BC, and the next being due on December 24, 2011.
Long count dates are precise counts of elapsed time based on the 360 -day year, which they called a tun, divided into 18 months of 20-day unials. The Mayan numbering system is based on 20, not ten, so a year was counted in groups of 20 tuns, termed a katun, and 20 katuns termed a baktun.
A Long Count date is made up of five numbers. The first figure records the baktun (400- year span). The second is the katun (20-year span), the third a tun (360-day span, the fourth a uinal (20- day span0 and the last a kin, a single day. The oldest recorded date is July 6, AD292, from Stela 29 at Tikal in northern Guatemala.
The Calendar Round simply names the day in two different calendars. The first is the sacred round of 260 days, the Tzolkin, composed of 20 day names and 13 numbers, It is pictured as a set of interlocking cog wheels representing circular time: one with numbers from one to 13, the other with 20 named days,
Ik – Day two,
Akbak – Day three etc.
Supplementing this is the Haab (also called the Vague Year), a year of 365 days made up of 182 day months and then a five day period at the end of the year. It takes 18950 days, or 52 365 day years, for a combination of these two methods to repeat itself.