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Calculators · GMT 584283
Convert a civil date
One elapsed-day number drives the Long Count, Tzolk’in and Haab’. The calculation is structural; no day meaning or personality is generated.
Supported public input: 1900–2100. Dates use the proleptic Gregorian leap rule throughout, including before 1582 if the engine is called directly.
A date is not an instant here
Historical sources discuss sunrise and sunset changes for different parts of the Maya date. This tool maps a whole civil date by its Julian Day Number. It does not claim that midnight was a universal Maya day boundary or resolve a birth moment near a local transition.