birth date

noun

variants or less commonly birthdate

ˈbərth-ˌdāt 

plural birth dates also birthdates

: the calendar date on which someone or something was born : date of birth

There's even some question about his birth date—one source says 1854, another says 1856.

—Eugene Robinson

Of course, the registered horse has a recorded birth date, but many horses are not so fortunate.

—R. B. Warren

(figurative) Modern British drama does, however, have a precise and undisputed birthdate: May 8, 1956. It is opening night at the fledgling Royal Court …

—Timothy Mason

Examples of birth date in a Sentence

Recent Examples on the Web

England at this tournament are a good example of this, with their quarter-final goalscorers Lucy Bronze (33) and Michelle Agyemang (22) having 14 years and three months between their respective birth dates. —Megan Feringa, New York Times, 22 July 2025

Any provider also should be able to look up your insurance with information such as your name, birth date and Social Security number. —Nicole Villalpando, Austin American Statesman, 10 July 2025

The next Social Security payments will be issued on May 14, 21 and 28, depending on recipients' birth dates. —Jordan King, MSNBC Newsweek, 6 May 2025

Mercado says her new veterinarian estimated the kitten to be about 7 weeks old and gifted her with the birth date of June 4. —Moná Thomas, People.com, 30 July 2025

Word History

First Known Use

1831, in the meaning defined above

Rhymes for birth date

• abate
• airfreight
• await
• baseplate
• berate
• birthdate
• birthrate
• bookplate
• borate
• breastplate
• bromate
• casemate