Tuesday, October 20, 2009
Mesoamerican technology: the remarkable Aztec calendar
The calendar consisted of a 365-day calendar cycle called xiuhpohualli (year count) and a 260-day ritual cycle called tonalpohualli (day count). These two cycles together formed a 52 year "century," sometimes called the "calendar round." The xiuhpohualli is considered to be the agricultural calendar, since it is based on the sun, and the tonalpohualli is considered to be the sacred calendar.