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.
Pending home sales declined 4% from a month earlier in September, the biggest monthly drop in more than three years.
From The Wall Street Journal ● Oct. 12, 2026
Loaded exports are up 10% from last September, but are still weaker than imports.
From Los Angeles Times ● Oct. 12, 2026
The Muse Wonder family comes after the breakout success of Meta’s Muse agent, which racked up over 5 million downloads in September.
From MarketWatch ● Oct. 12, 2026
Around 200,000 have been driven from their homes since the start of this escalation at the beginning of September, according to the International Organization for Migration - all this in the Arab world's poorest country.
From BBC ● Oct. 12, 2026
It's almost four-thirty in the afternoon on September 13, 1848.
From "Phineas Gage" by John Fleischman
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.
