The Maya Long Count was a non-repeating vigesimal calendar that counted days from a mythical creation set at 11 August 3114 BCE, letting scribes fix any event in absolute time. Interlocking with the 260-day ritual and 365-day solar cycles, it framed a cosmology in which time, the cardinal directions and a layered universe were a single ordered system. Long Count dates were carved on stelae to anchor dynastic history and the founding of cities. Maya astronomers tracked Venus and eclipse cycles to schedule ritual and rule.
It is one of humanity's most precise pre-modern timekeeping systems and shaped how Maya cities aligned monuments and legitimised their rulers. The calendar embodied a distinctively Mesoamerican fusion of astronomy, religion and statecraft.