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
- Septembral adjective
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 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 state trial, originally scheduled for June, was postponed until September.
From Barron's • Apr. 3, 2026
In September, the college senior started messaging online with an anonymous user who seemed to have insider knowledge.
From The Wall Street Journal • Apr. 3, 2026
Shares of Verizon rose 23.3% in the first three months of the year, making for their largest quarterly gain since the September quarter of 2010, according to Dow Jones Market Data.
From MarketWatch • Apr. 2, 2026
Rodrigo’s second album, “Guts,” which dropped in September 2023, had a pop-punk edge compared to “Sour.”
From Los Angeles Times • Apr. 2, 2026
On September 14, the Germans began an orderly retreat.
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.
