Calendar: Did you mean...?

The BCE/CE dating system was first used in the 17th century and has been used since in scholarly publications read by people of all faiths and cultures in an effort to be inclusive. This system is also...

The Maya are a people indigenous to Mexico and Central America who have continuously inhabited the modern regions of Yucatan, Quintana Roo, Campeche, Tabasco, and Chiapas...

The Sun Stone (or The Calendar Stone), Aztec, reign of Moctezuma II (1502-20), discovered in 1790 at the southeastern edge of the Plaza Mayor (Zocalo) in Mexico City, stone (unfinished), 358 cm diameter...

The Maya are an indigenous people of Mexico and Central America who have continuously inhabited the lands comprising modern-day Yucatan, Quintana Roo, Campeche, Tabasco, and Chiapas in Mexico and southward through Guatemala...

The Babylonians developed a calendar based on the moon and sun cycles. The Lunar calendar was designed to work in conjunction with the solar cycle by adding leap months known an "intercalary" months.

Omar Khayyam (also given as Umar Khayyam, l. 1048-1131 CE) was a Persian polymath, astronomer, mathematician, and philosopher but is best known in the West as a poet, the author of The Rubaiyat of Omar Khayyam. His famous work has...

The term science comes from the Latin word scientia, meaning "knowledge". It can be defined as a systematic attempt to discover, by means of observation and reasoning, particular facts about the world, and to establish laws connecting...

Walpurgis Night (30 April, annually) is a modern-day European and Scandinavian festival derived from the merging of the ancient pagan celebration of Beltane with the commemoration of the canonization of the Christian Saint Walpurga...

The gods of the Aztecs (1345-1521 CE) were many and varied and, as with many other ancient cultures, deities were closely associated with things and events important to the culture and the general welfare of the community. These...

The Celtic languages form a branch of the Indo-European (IE) language family. They derive from Proto-Celtic and are divided into Continental Celtic languages (Lepontic, Gaulish, Galatian, Noric, Celtiberian...