September is the ninth month of the year in the Gregorian calendar and interchangeably the ninth or tenth month in the less commonly used Julian calendar. In the modern Gregorian calendar, its length is 30 days. September in the Northern Hemisphere and March in the Southern Hemisphere are seasonally equivalent. In the Northern hemisphere, the beginning of the meteorological autumn is on 1 September. In the Southern hemisphere, the beginning of the meteorological spring is on 1 September. . September marks the beginning of the ecclesiastical year in the Eastern Orthodox Church.
https://en.wikipedia.org/wiki/September
September is the ninth month of the year in the Gregorian calendar and interchangeably the ninth or tenth month in the less commonly used Julian calendar. In the modern Gregorian calendar, its length is 30 days. September in the Northern Hemisphere and March in the Southern Hemisphere are seasonally equivalent. In the Northern hemisphere, the beginning of the meteorological autumn is on 1 September. In the Southern hemisphere, the beginning of the meteorological spring is on 1 September. . September marks the beginning of the ecclesiastical year in the Eastern Orthodox Church.
