A month is a unit of time, used with calendars, that is approximately as long as a natural orbital period of the Moon; the words month and Moon are cognates.The traditional concept arose with the cycle of Moon phases; such lunar months ("lunations") are synodic months and last approximately 29.53 days.From excavated tally sticks, researchers have deduced that people …

Family. Arcas was the son of Zeus and Callisto. He was married to either Laodamia (), daughter of Amyclas of Sparta; Meganeira, daughter of Crocon; the nymph Chrysopeleia; or the Dryad Erato.He also left a number of children, including the sons Azan, Apheidas, Elatus, and Triphylus, an illegitimate son Autolaus and at least two daughters, Hyperippe and Diomeneia.