The Haab’ and the Tzolk’in

The pre-Columbian Maya people were good at math.

Why were they good at math?

They had two calendars: One, the Haab’, was roughly equivalent to our 365-day solar calendar. The other, the Tzolk’in (or Sacred Round), was a 260-day calendar delineating the spiritual year.

According to one textbook, anyway, they developed advanced math skills in the process of trying to synchronize their two calendars.

Side note: Why 260 days? Read the fascinating theories in wikipedia under the heading Origin of the Tzolk’in.

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