Multiple Calendar Systems
The ancient Maya used several interlocking calendar systems, including the Tzolk'in (a 260-day ritual calendar), the Haab' (a 365-day solar calendar), and the Long Count, which tracked longer periods of time.
The Long Count Calendar
The Long Count calendar begins from a mythical creation date around 3114 BCE and measures time in cycles called baktuns, each lasting about 394 years, famously associated with the 2012 'end of the world' myth, which was actually just the end of a cycle.
Base-20 Number System
Mayan timekeeping relied on a vigesimal (base-20) numeral system, which influenced how they counted days, with units like the kin (1 day), uinal (20 days), tun (360 days), katun (7,200 days), and baktun (144,000 days).
Astronomical Precision
The Maya were expert astronomers; their calendars accurately tracked solar years, lunar cycles, and the movements of planets like Venus, which they associated with warfare and used to time battles.
The Calendar Round
By combining the Tzolk'in and Haab' calendars, the Maya created the Calendar Round, a 52-year cycle that repeats every 18,980 days, used for naming days uniquely within that period.
Religious and Mythical Significance
Mayan calendars were deeply tied to mythology; days in the Tzolk'in were named after gods and animals, and the calendar was used for divination, rituals, and predicting auspicious times for events like planting or coronations.
The Dresden Codex
One of the few surviving Mayan books, the Dresden Codex contains detailed astronomical tables and calendar information, including eclipse predictions and Venus cycles, showcasing their advanced timekeeping knowledge.
No Leap Years, But Close
The Haab' calendar had 365 days divided into 18 months of 20 days each plus a 5-day 'unlucky' period, but without leap years, it slowly drifted from the solar year, though the Maya were aware of this discrepancy.
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