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 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.
Then, in early September, they were shocked to discover the Eastlands had sent an email to the rest of the Mystic community: Camp was back on.
From The Wall Street Journal • Apr. 18, 2026
He formally took up the post in February 2025, before being removed last September when further details about his past ties with convicted sex offender Jeffrey Epstein came to light.
From BBC • Apr. 18, 2026
Speaking at the University of Kansas, the senior liberal justice was asked about a September 2025 decision that dealt with the rules for federal immigration agents to detain people and ask about their citizenship.
From The Wall Street Journal • Apr. 18, 2026
Cerebras first filed to go public in September 2024, but later withdrew its plans.
From MarketWatch • Apr. 17, 2026
On September 7, 1776, it made its historic, first-ever attack on an enemy warship when it attempted to sink British Admiral Richard Howe’s flagship H.M.S.
From "Shipwrecked!" by Martin W. Sandler
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.
