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
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 kingdom’s oil exports in September came to 7 million barrels a day, double August’s haul, as the country loaded tankers in both the Persian Gulf and the Red Sea, Kpler data show.
From The Wall Street Journal ● Oct. 6, 2026
Schmidt, who has Samoan and German heritage, took office as the country's eighth prime minister in September 2025.
From BBC ● Oct. 6, 2026
Students have blocked the entrances to hundreds of high schools for 15 to 17-year-olds since late September, complaining of missing teachers, overloaded timetables, dilapidated classrooms and buildings that cannot cope with rising temperatures.
From Barron's ● Oct. 6, 2026
A business survey by S&P Global showed a jump in manufacturing sentiment in September to its highest level since May 2023.
From The Wall Street Journal ● Oct. 6, 2026
He was now doing this so well that, from January 2007 until the market crashed in September, Harding Advisory would be the world’s biggest subprime CDO manager.
From "The Big Short" by Michael Lewis
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.
