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 heavily during the Colonial Period that they used their origin story as justification to claim native lands. Ancestor worship is a common theme in Mesoamerican cosmovision. The northern, Nahautl-speaking people all shared a common origin story, which is depicted in the Mapa de Cuauhtinchan. This map serves not only to center the Mesoamerican world through the stories of its ancestors and rulers, but also depicts urban centers, which reflect worldmaking. Finally, the Mapa de Cuauhtinchan also reveals ceremonial rituals, an essential component of worldrenewing. All of these themes are clearly important to native Mesoamericans right up through the Colonial Period.