These calendars have been dated to early as ca. 1100 BCE. By 500 BCE at the latest, the essentials were fully defined and functional. 260-day calendars are...

Aztec calendar Maya astronomy Maya calendar Maya codices Mesoamerican calendars The correlation between the Long Count and Western calendars is calculated...

subcontinent), Chinese calendars and Mesoamerican calendars. These are not specific calendars but series of historical calendars undergoing reforms or...

Mesoamerican calendars, sharing the basic structure of calendars from throughout the region. The Aztec sun stone, also called the calendar stone, is on...

of the ritual Mesoamerican ballgame) Record keeping: use of two different calendars (a 260-day ritual calendar and a 365-day calendar based on the solar...

associated with the four Yearbearers in Mesoamerican calendars, and the directional colors and deities. Mesoamerican codices which have this association outlined...

Mesoamerican calendar used by the Maya civilization of pre-Columbian Mesoamerica.[citation needed] The tzolkʼin, the basic cycle of the Maya calendar...

common with other Mesoamerican calendars, had its origins in the Preclassic period. However, it was the Maya that developed the calendar to its maximum sophistication...

A trecena is a 13-day period used in pre-Columbian Mesoamerican calendars. The 260-day calendar (the tonalpohualli) was divided into 20 trecenas. Trecena...

Guipuscoan Basque. The Aztecs and Mayas used the Mesoamerican calendars. The most important of these calendars divided a ritual cycle of 260 days (known as...