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.
In September, St. Michael’s rolled out a new social-media campaign on Instagram featuring Emma MacDonald, a senior who hopes to go into broadcast journalism.
From The Wall Street Journal • Apr. 9, 2026
Five years in the minor leagues after having attended college meant Lopes was 27 when he made his major league debut that September.
From Los Angeles Times • Apr. 8, 2026
American car shoppers had cooled on electric vehicles last year after tax credits encouraging their ownership expired in September, and EV sales by big auto makers like Ford Motor and GM fell.
From Barron's • Apr. 8, 2026
The average rate for a 30-year fixed mortgage rose to 6.46% last week, the highest level since September, according to Freddie Mac.
From The Wall Street Journal • Apr. 8, 2026
A lot, he didn’t add, since back in September she had volunteered her place to be HQ for MAVS’s weekly meetings.
From "Legendary Frybread Drive-In" by Cynthia Leitich Smith
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.
