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

There, you will be asked to enter the promo code Newsweek and basic identifying information, like your name, birth date, address, etc. —Tyler Everett, MSNBC Newsweek, 28 Sep. 2025

Their data analysts then calculated the differences in the share of alcohol items purchased for each category by customer star sign (users must enter their birth date to purchase) and compared that info to the overall share of alcohol items. —Karla Walsh, Better Homes & Gardens, 22 Sep. 2025

So now the world knows our daughter’s name and exact birth date. —Liz Weston, San Diego Union-Tribune, 21 Sep. 2025

Today, Roblox’s default settings do not allow adults to directly message children under the age of 13, but children can still create accounts with fake birth dates, giving them full access to direct-messaging options, the complaint said. —Marlene Lenthang, NBC news, 14 Sep. 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