The term “Athenian Calendar” (also called the “Attic Calendar”) has become somewhat of a misnomer, since Ancient Athenians never really used just one method to reckon the passage of time. Athenians, especially from the 3rd Century BCE forward, could consult any one of five separate “calendars:” Olympiad, Seasonal, Civil, Conciliar, and finally Metonic – depending on what event or type of event they wished to chronicle. Athenians, furthermore, either created these calendars for specific purposes or adopted them from others.
This is a companion discussion topic for the original content at https://www.worldhistory.org/article/833/the-athenian-calendar/.