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 ...

The Mayan civilization dates back to 2000 B.C., and extended through what is now southern Mexico, Guatemala, Belize, El Salvador, and parts of Honduras. During the civilization's peak, from A.D ...