Characteristic of this system is the cyclical nature, with the Mayan calendar featuring three common cycles: the Long Count, Tzolk’in (260-day) and the 365-day, solar-based Haab’. Combined ...

Researchers have long believed this calendar was associated with ... one planet,” the authors write, “the Maya astronomers who created the 819-day count envisioned it as a larger calendar ...

Baktuns were roughly 394-year periods and 13 was a significant, sacred number for the Mayans. The Mayan Long Count calendar begins in 3114 BC, and the 13th Baktun ends around December 21, 2012. But ...