Ancient calandars

Aztec calendar

Aztec Calendar

The Aztec calendar, also known as the Mexica calendar, is an intricate timekeeping system that was central to the Aztec civilization and many other pre-Columbian [...]
Mayan calendar

Mayan calendar systems and astronomy

The age-old Maya civilization blossomed in Mesoamerica, a region now split up into Central America and Mexico. The Maya had more advanced astrology from the [...]
Mayan calendar

The Mayan mystic 819-day calendar

The ancient Mayans, known for their remarkable achievements in mathematics and astronomy, created several complex timekeeping systems (calendars) that guided their religious, agricultural, and everyday [...]