Mesoamerican Long Count Calendar

The Mesoamerican Long Count calendar is a non-repeating, vigesimal (base-20) and base-18 calendar used by several Pre-Columbian Mesoamerican cultures, most notably the Maya. For this reason, it is sometimes known as the Maya (or Mayan) Long Count calendar. Using a modified vigesimal tally, the Long Count calendar identifies a day by counting the number of days passed since a mythical creation date that corresponds to August 11, 3114 BCE in the Gregorian calendar. The Long Count calendar was widely used on monuments.

Read more about Mesoamerican Long Count Calendar:  Background, Long Count Periods, Mesoamerican Numerals, Earliest Long Counts, Correlations Between Western Calendars and The Long Count, 2012 and The Long Count, Calculating A Full Long Count Date, Piktuns and Higher Orders

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