Based on the Mayan calendar the 13th Baktun will be taking place December 21, 2012. In addition to it’s Three Night/Four Day Maya Culture Package from $307 Maya World Tours, offers several options to book your clients visiting Guatemala for this important main event. A “baktun” is 20 cycles of the ancient Maya calendar of Long Count. It contains 144,000 days, equal to 394.26 tropical years. The Mesoamerican chronology Classic period of Maya civilization occurred during the 8th and 9th baktuns of the current calendrical cycle. The current (13th) baktun will end, or be completed, on 188.8.131.52.0 (December 21, 2012 using the GMT correlation). This also marks the beginning of the 14th baktun, as such a term is usually used among Mayanists.