<Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> <P> The Aztec or Mexica calendar is the calendar system that was used by the Aztecs as well as other Pre-Columbian peoples of central Mexico . It is one of the Mesoamerican calendars, sharing the basic structure of calendars from throughout ancient Mesoamerica . </P> <P> The calendar consisted of a 365 - day calendar cycle called xiuhpōhualli (year count) and a 260 - day ritual cycle called tōnalpōhualli (day count). These two cycles together formed a 52 - year "century," sometimes called the "calendar round". The xiuhpōhualli is considered to be the agricultural calendar, since it is based on the sun, and the tōnalpōhualli is considered to be the sacred calendar . </P> <P> The tōnalpōhualli ("day count") consists of a cycle of 260 days, each day signified by a combination of a number from 1 to 13, and one of the twenty day signs . With each new day, both the number and day sign would be incremented: 1 Crocodile is followed by 2 Wind, 3 House, 4 Lizard, and so forth up to 13 Reed, after which the cycle of numbers would restart (though the twenty day signs had not yet been exhausted) resulting in 1 Jaguar, 2 Eagle, and so on, as the days immediately following 13 Reed . This cycle of number and day signs would continue similarly until the 20th week, which would start on 1 Rabbit, and end on 13 Flower . It would take a full 260 days (13 × 20) for the two cycles (of twenty day signs, and thirteen numbers) to realign and repeat the sequence back on 1 Crocodile . </P>

How many calendars and months did the aztecs have explain each calendar
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