Mesoamerican Long Count calendar 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 often 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 Proleptic Gregorian calendar. The Long Count calendar was widely used on monuments. The two most widely used calendars in pre-Columbian Mesoamerica, were the 260-day Tzolk'in
Calendar house the year. And even the park wall has 12 doors opening towards the outside, seven of which face towards the city. A possible Mesoamerican example is El Castillo, Chichen Itza, which is a Mesoamerican step pyramid with 91 steps on each of its four sides. Taking these steps, and adding the temple platform on top as the final "step", produces a total of 365 steps. Calendar house A calendar house is a house that symbolically contains architectural elements in quantities that represent the respective numbers of days in a year, weeks in a year, months in a year and days