History & development
The Maya calendar combines cycles with a count of elapsed days. Long Count notation supports dated inscriptions, while the Haab organizes a 365-day sequence. The joint recurrence of the 260-day and 365-day counts forms the Calendar Round, a different structure from the Long Count.
Mythology & symbolic world
Calendar dates can be embedded in accounts of creation, rulership and ceremony. These contexts explain why time could carry religious significance, but a large-cycle rollover is not intrinsically a prediction of the end of the world.
Provenance: where the rules come from
The Smithsonian converter states the Long Count units. The engine records GMT584283 as the selected bridge to Julian day numbers, and preserves numerical results separately from cultural interpretations.
How it is calculated
Choices that change the result: Correlation constant must be recorded.
Inspect your calculated data →Uses & use cases
- Read a Long Count date as a sum of day units.
- Understand which information a Calendar Round date leaves unspecified.
Interpretation methods
Translate units and cycles
Use units of 144000, 7200, 360, 20 and one day; compute the Haab position separately and combine it with the sacred-count label if a Calendar Round is needed.
A Long Count locates a date within a longer chronology. A Calendar Round label recurs after 18,980 days, so that recurring label alone does not identify one unique era.
Concepts in this tradition
Follow a term for its definition, word origin, evidence and connected ideas.
Disagreements & limits
Sources & evidence
Practitioner sources describe their own systems. Historical and astronomical sources support different kinds of claims. Reading exercises are editorial teaching examples.
- Maya Calendar Converter — Smithsonian National Museum of the American Indian ↗institutional calendar reference
- 2012: Science and Prophecy of the Ancient Maya, Part 4 — Mark Van Stone / FAMSI ↗scholarly calendrical explanation