September 12th (490) was a Tuesday. It's the 254th day of the year (255th in leap years) in the Gregorian calendar. There are 111 days left to the end of the year.
Historical Events for 12th September, 490
» Battle of Marathon: The conventionally accepted date for the Battle of Marathon. The Athenians and their Plataean allies, defeat the first Persian invasion force of Greece.