By 1,800 years ago, speakers of proto-Ch'olan, the ancestor of three present-day Maya languages, had developed a calendar of eighteen twenty-day months plus a set of five days for a total of 365 days. This original Maya calendar, used extensively during the Classic period (200-900 CE), recorded in hieroglyphic inscriptions the dates of dynastic and cosmological importance. Over time, and especially after the Mayas' contact with Europeans, the month names that had originated with these inscriptions developed into fourteen distinct traditions, each connected to a different ethnic group....
By 1,800 years ago, speakers of proto-Ch'olan, the ancestor of three present-day Maya languages, had developed a calendar of eighteen twenty-da...
