Scholars show how multiple planet movements tie into the 819-day Mayan calendar. The 819 days of the calendar must be viewed across a 45-year time period ... Saturn has 13 periods to fit with ...

We once used to embrace a 13-month calendar, and some cultures still follow this format. So why are they 12 months instead of 13?

Despite the mysticism that often clouds the Mayan calendar in popular culture, fact remains that the calendar system in use by the Mayans was based on a system used throughout the pre-Columbian ...