Focusing on the Prehispanic Panel of Oaxaca en la historia y en el mito, explain the Dates and Names on codices about the Codices.
Dates and Names on codices The Mixtec calendar is similar to the Aztec calendar. In the Mixtec culture, names were taken from birthdates on the ritual calendar.  We observed above that the name of Lady One Death is indicated on the mural by a skull for death and one dote for the year one. There are 20 glyphs, mostly selected from nature, like the skull, for days on codices, and used throughout Mesoamérica. And there are 13 periods of 20 days.  This makes for a ritual year of 260 days. There was also a calendar of 365 days and a cycle of 52 years.
Aztec calendar Mixtec mural