September 9 is the 252nd day of the year (253rd in leap years) in the Gregorian calendar; 113 days remain until the end of the year. == Events == === Pre-1600 === 337 – Constantine II, Constantius II, and Constans succeed their father Constantine I as co-emperors.
September 9 is the 252nd day of the year (253rd in leap years) in the Gregorian calendar; 113 days remain until the end of the year. == Events == === Pre-1600 === 337 – Constantine II, Constantius II, and Constans succeed their father Constantine I as co-emperors.
Source: Wikipedia "September 9" · CC BY-SA 4.0
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