September (Latin septem, “seven”) was originally the seventh of ten months on the Roman calendar, with March (Latin Martius) the first month of the year until perhaps as late as 153 BC. After the calendar reform 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’s birthstone is the sapphire.
The birth flowers for September are the forget-me-not, morning glory and aster.
The zodiac signs are Virgo (August 22 – September 22) and Libra (September 23 – October 22)