365-day calendar 365-day calendar A 365-day calendar consists of exactly 365 days per year (no leap days), and is primarily used in computer models and as an assumption in every-day calculations. For example, a calculation of a daily rate may use an annual total divided by exactly 365. Interest rates in some banks are calculated using a 365-day calendar. Some Mesoamerican calendars used a 365-day year with no leap year, resulting in a gradual shift of the seasons relative to the calendar. This includes the Maya Haab' and the Aztec Xiuhpohualli calendars. Some versions of the Zoroastrian calendar also use a fixed
Mesoamerican cosmovision and adherence to calendar systems. Mesoamericans did not understand human sacrifice as a malicious act, but rather sacrifices were carried out in an effort to renew and center their world, as well as pay debts to the gods. Mesoamericans carried out ritual sacrifice in order to balance, center, and renew their cosmo-magical world, which hinged upon ever-present duality: the human and the divine (the earth and the cosmos). Cosmovision is understood as one of the structures that is found throughout Mesoamerican history. It is evident that the concept was one adopted in varying forms by all Mesoamerican cultures, and aided