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.
Investors expect the ECB to raise borrowing costs at the same time after inflation picked up in May to its highest level since September 2023.
From The Wall Street Journal • Jun. 9, 2026
The presentation marked Apple CEO Tim Cook's final appearance at the company's annual Worldwide developers conference -- Cook will cede the reins to longtime executive John Ternus in September.
From Barron's • Jun. 8, 2026
OpenAI has been working with a few bankers, including Morgan Stanley and Goldman Sachs, on the IPO process and aims to go public as soon as September, the Wall Street Journal earlier reported.
From MarketWatch • Jun. 8, 2026
Apple Chief Executive Tim Cook is planning to step down in September, handing the reins to John Ternus, senior vice president of hardware engineering.
From Los Angeles Times • Jun. 8, 2026
In September 1915, the Allies launched a major offensive in France, hoping to break through enemy lines, drive the Germans back to the Meuse River, and end the war.
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.
