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 Justice Department has sued 30 states and the District of Columbia after officials in those places refused to hand over their voter rolls, which contain names, birth dates, drivers' license numbers and partial Social Security numbers. —Sarah N. Lynch, CBS News, 17 Apr. 2026

These included breaches of passport information, payment card numbers, loyalty numbers, birth dates, email addresses, and more personal information. —Michael Cappetta, Travel + Leisure, 14 Apr. 2026

The remembrance, which featured the Grey’s Anatomy alum’s picture and his birth dates, is similar to the one HBO Max previously posted for late actor Angus Cloud. —Natalie Oganesyan, Deadline, 12 Apr. 2026

Draftees would be chosen by a national draft lottery, using birth dates. —George Petras, USA Today, 30 Mar. 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