September
Americannoun
noun
Usage
What is September? September is the ninth month of the year in the Gregorian calendar. It has 30 days and is between August and October. In the Northern Hemisphere, September is known as the first month of the autumn season, while in the Southern Hemisphere, it’s the first month of the spring season. Much of the world celebrates International Workers Day in May, but in the United States and Canada, a similar celebration, called Labor Day, is held. It is celebrated on the first Monday of September. The Jewish holiday Rosh Hashanah, which marks the beginning of the year, is normally held in September. The holiday’s exact date changes because it is set according to the Hebrew calendar, which is based on the Moon’s cycle. Example: For many people, September is a calm month before the holidays in October, November, and December.
Other Word Forms
Derived Forms
Etymology
Origin of September
First recorded before 1050; Middle English Septembre, Old English, from Latin September “seventh month” in the early Roman calendar; for formation see December
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The company has filed confidentially filed for an IPO and the Wall Street Journal reported that it had engaged Morgan Stanley and Goldman Sachs to advise on a potential listing in September.
From MarketWatch • Jun. 10, 2026
Bitcoin is now trading at its lowest level since September 2024.
From The Wall Street Journal • Jun. 10, 2026
The nadir came in September 2025, when the 160-year-old conglomerate hired its third CEO in just 13 months.
From Barron's • Jun. 10, 2026
The census, which was carried out over a week in September 2025, uncovered the women by working with all 33 London councils and 68 others across England, amounting to a third of all local authorities.
From BBC • Jun. 10, 2026
In September 1914, it was French pilots flying over enemy lines who watched two advancing German units change direction, opening a gap between them and setting the stage for the Battle of the Marne.
From "The War to End All Wars: World War I" by Russell Freedman
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
