Mesoamerica movements of celestial bodies and memorialize public officials. The 260-day cycle was also used for divination, and (like the Catholic calendar of saints) to name newborns. The names given to the days, months, and years in the Mesoamerican calendar came, for the most part, from animals, flowers, heavenly bodies, and cultural concepts that held symbolic significance in Mesoamerican culture. This calendar was used throughout the history of Mesoamerican by nearly every culture. Even today, several Maya groups in Guatemala, including the [[K'iche' people|K'iche']], [[Q'eqchi' people|Q'eqchi']], [[Kaqchikel people|Kaqchikel]], and the [[Mixe]] people of Oaxaca continue using modernized forms of the Mesoamerican
Mesoamerican Long Count calendar the GMT correlation is historical, astronomical and archaeological: Historical: Calendar Round dates with a corresponding Julian date are recorded in Diego de Landa's "Relación de las cosas de Yucatán" (written circa 1566), the Chronicle of Oxcutzkab and the books of Chilam Balam. De Landa records a date that is a Tun ending in the Short Count. Oxkutzcab contains 12 Tun endings. Bricker and Bricker find that only the GMT correlation in consistent with these dates. The Book of Chilam Balam of Chumayel contains the only colonial reference to classic long-count dates. The Julian calendar date of 11.16.0.0.0 confirms the GMT