Septem means “seven” in Latin. So why is September the ninth month of the year?

September was the seventh month of the Roman calendar until it was revised in 153 BC. September was the 7th of ten months, which began in March.

Emperor Commodus
Emperor Commodus

In 184 AD, Emperor Commodus renamed all the months to honor himself.

  • September’s birthstone is the sapphire, meaning clear thinking.
  • The birthflowers for September are the forget-me-not and aster.
  • September’s moon is the Full Corn Moon, the time that corn is harvested.

September is the usual start of the academic year. Labor Day is observed on the first Monday in September in the United States and Canada. September 11 is Patriot Day.

Happy 1st of Commodus to all!

(originally published on in 2009)

Please follow and like us: