In the old Roman calendar, September was the seventh month, which is where it got its name ("Septem" means "seventh"). The ninth month at the time was November ("Novem" means "ninth"). With Julius Caesar's calendar reform, September became the ninth month, with 30 days. September comes after August and before October.
An equinox occurs in September, either on the 22nd or 23rd, meaning there are days and nights of about equal length, half way between the June and December solstices. In the Northern Hemisphere, Autumn (Fall) begins in this month, while in the Southern Hemisphere, this is the beginning of Spring.
In Ancient Greece, September was called Boedromion. The Anglo-Saxons called it Gerstmonath, meaning "Barley month", referring to the harvest. In other countries, it is referred to as Autumn Month, such as in Finland (Syyskuu) and German-speaking parts of Switzerland (Herbstmonat).
The birth stone for September is the sapphire, symbolising clear thinking.
The Zodiac signs for September are Virgo (August 23 – September 23) and Libra (September 24 – October 23).
In the English language, September comes last alphabetically out of all the months of the year.
Also in the English language, September has the longest name of all the months of the year, with nine letters. Coincidentally, it is also the ninth month.
September is the first of four months in-a-row to have a name ending in "ber", with the last three months of the year, October, November and December, also doing so.
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All the best Jan