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

The payment is part of the agency's regular monthly distribution schedule, which sends benefits on Wednesdays based on recipients' birth dates. — Fernando Cervantes Jr, USA Today, 17 Aug. 2026

Even the public versions, which political parties and candidates routinely obtain to target ads and messages, included voters’ addresses, birth dates and party affiliations. — Peter Elkind, ProPublica, 14 Aug. 2026

If passed, the bill would prevent the TSA from sharing data that includes passenger names and birth dates with ICE. — Dan Raby, CBS News, 12 Aug. 2026

When asked for comment on the case, ICE representatives asked for Rosario’s birth date and A-number — which is assigned after an immigration arrest. — Meredith Colias-Pete, Chicago Tribune, 9 Aug. 2026

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