Three calendars · one day

Gregorian × Aztec × Maya

Enter a date to see the Gregorian, Mexica, and Maya calendar results together.

Mexica / Aztec

Tonalpohualli · Xiuhpohualli

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Sacred 260-day count

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Choose a date

Your Nahua day sign and its traditional qualities will appear here.

Solar count—

Month meaning—

Maya

Tzolk’in · Haab’ · Long Count

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Sacred 260-day count

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Choose a date

The corresponding Maya day name, solar position, and Long Count will appear here.

Haab’ solar date—

Long Count—

Gregorian

International civil calendar

Civil date

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Choose a date

The same day in the Gregorian calendar, which numbers years and uses months of varying lengths.

Day of year—

Year—

Calendar round

How the cycles meet

The Tonalpohualli and Tzolk’in each combine 13 numbers with 20 day names. Their solar partners contain 365 days. A sacred and solar pairing repeats every 18,980 days—about 52 years.

Sacred cycle

260

Solar cycle

365

Calendar round

18,980

Related, not identical

These traditions share Mesoamerican cycle structures, but their day names, ceremonies, histories, and communities are distinct. The page compares their mathematical rhythms without treating one as a translation of the other.

Correlation note

The Mexica result preserves this project’s August 13, 1521 ≈ 1 Coatl anchor. Maya Long Count results use the widely used GMT 584283 correlation. Ancient-calendar correlations are scholarly reconstructions and can vary.