tonalpohualli

Noun

 * 1) A Mexica version of the 260-day calendar in use in pre-Columbian Mesoamerica.

Etymology
From, literally (“count of the days”).

Noun

 * 1) A sacred calendrical period used by the Aztecs. It was composed of 20 trecenas adding up to 260 days.

Related terms

 * tonalamatl