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Comparing calendars

Maya vs Aztec

The Maya and Aztec calendars share one Mesoamerican design — a 365-day year turning against a 260-day sacred round — but the Maya also kept a Long Count of days from a mythic creation, where the Aztec simply cycled every fifty-two years.

AttributeMayaAztec
TypeA continuous day-count with interlocking roundsA 365-day count with a 260-day sacred round
OriginThe Maya civilization of MesoamericaThe Aztec (Mexica) civilization of Mesoamerica
YearA 365-day Haabʼ runs alongside the continuous count of daysThe 365-day Xiuhpōhualli
MonthsThe Haabʼ has 18 of 20 days, plus 5 (the Wayebʼ)18 veintenas of 20 days, plus 5 (the nemontemi)
WeekNo week; a 260-day sacred round (the Tzolkʼin)No week; a 260-day sacred round (the Tōnalpōhualli)
Leap ruleNone — the Haabʼ drifts against the solar yearNone
Counts years fromA mythic creation in 3114 BCE (GMT correlation)No running count; years turn in a 52-year round
Where it’s usedHistorical; still kept by some Maya communitiesHistorical (Caso correlation)

See this moment on each: Maya Long Count · Aztec calendar. Or convert a specific date into both.

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