September

American  

[sep-tem-ber] / sɛpˈtɛm bər /

noun

1. the ninth month of the year, containing 30 days. Sept., Sep.

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September British  

/ sɛpˈtɛmbə /

noun

1. the ninth month of the year, consisting of 30 days

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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

Despite it coming just days after the 3-0 defeat at Manchester City in September, he honoured a commitment to speak at the 40th anniversary dinner of United's past players.

From BBC

Released in September, it lit a rocket under their career, featuring at the top of multiple best of 2025 lists, which DiGesu, 23, says is "pretty weird and new for us."

From BBC

The Solheim Cup goes to the Netherlands for the first time and expect Anna Nordqvist's Europeans to make a strong bid to regain the trophy in September.

From BBC

In September 2023 the NRA approved Chubu Electric's estimate of 1,200 gal, a unit of acceleration used to measure the intensity of quakes.

From Barron's

The service, which was first announced in September, will allow patients to have assessments, check-ups and follow-up appointments online and will have its own dedicated team of doctors.

From BBC