Just in case you did not know:
September is the ninth month of the year in the Julian and Gregorian Calendars and one of four months with a length of 30 days.
September in the Northern Hemisphere is the seasonal equivalent of March in the Southern Hemisphere.
In the Northern hemisphere, the beginning of the meteorological autumn is on the 1st of September. In the Southern hemisphere, the beginning of the meteorological spring is on the 1st of September.[1]
September begins on the same day of the week as December every year, because there are 91 days separating September and December, which is a multiple of seven (the number of days in the week). No other month ends on the same day of the week as September in any year.
September (from Latin septem, "seven") was originally the seventh of ten months on the oldest known Roman calendar, with March (Latin Martius) the first month of the year until perhaps as late as 153 BC.[2] After the calendar reform that added January and February to the beginning of the year, September became the ninth month, but retained its name. It had 29 days until the Julian reform, which added a day.
September is the sixth month of the astrological calendar, which begins end of March/Mars/Aries.
September marks the beginning of the ecclesiastical year in the Eastern Orthodox Church.