Maya calendar Maya calendar The Maya calendar is a system of calendars used in pre-Columbian Mesoamerica and in many modern communities in the Guatemalan highlands, Veracruz, Oaxaca and Chiapas, Mexico. The essentials of the Maya calendar are based upon a system which had been in common use throughout the region, dating back to at least the 5th century BCE. It shares many aspects with calendars employed by other earlier Mesoamerican civilizations, such as the Zapotec and Olmec and contemporary or later ones such as the Mixtec and Aztec calendars. By the Maya mythological tradition, as documented in Colonial Yucatec accounts and reconstructed
Armenian calendar Armenian calendar The Armenian calendar is the calendar traditionally used in Armenia. The older Armenian calendar was based on an invariant year length of 365 days. As a result, the correspondence between it and both the solar year and the Julian calendar slowly drifted over time, shifting across a year of the Julian calendar once in 1,461 calendar years (see Sothic cycle). Thus, the Armenian year 1461 (Gregorian 2010/2011) completed the first full cycle. Armenian year 1 began on 11 July 552 of the Julian calendar, and Armenian year 1462 began on 11 July 2012 of the Julian calendar which