Date of birth is commonly called the birthdate, abbreviated as DOB, and refers to the specific day, month, and year someone was born, while their annual celebration is their birthday, which marks the anniversary of that day. Other terms include natal day or simply the full date itself on forms.
There is a distinction between birthday and birthdate (also known as date of birth): the former, except for February 29, occurs each year (e.g. January 15), while the latter is the complete date when a person was born (e.g. January 15, 2001).
Capitalize acronyms
NASA (National Aeronautics and Space Administration), POTUS (President of the United States), and DOB (Date Of Birth) are all capitalized.
In both varieties of English, ordinal numbers may also be used to indicate the day (e.g. 1st January 2025 or January 1st, 2025); however, the UOC prefers that cardinal numbers be used instead.
(slang, chiefly Australia, New Zealand) To report (a person) to someone in authority for a wrongdoing. I'll dob on you if you break in. You dobbed me in!
DOB or Dob often refers to date of birth.
(British, informal) To tell, or inform, on (someone) shop. betray. expose. inform on.
Synonyms of date
English pronunciation of dob
Across many nations, the rarest birthdays often fall on major holidays, when fewer births— especially planned ones-are scheduled. Dates like December 25 (Christmas Day), January 1 (New Year's Day), and December 24 consistently rank among the least common.
: the month, day, and year a person was born : birth date.
Common Australian slang for a girl includes "Sheila" (older, sometimes dated or slightly derogatory), "chick," or just using general terms like "mate," "gal," or "lass," with context and tone being important, but "girl" is still widely used; some slang, like "moll," can refer to a girlfriend or a promiscuous woman, while "bogan" describes an unsophisticated person.
"Ozzy, Ozzy, Ozzy, Oi, Oi, Oi!" is a popular Australian sports chant, a variation of the British "Oggy, Oggy, Oggy" cheer, used to express national pride and support for Australian teams, with "Ozzy" being slang for "Australian" and "Oi, Oi, Oi" a general interjection for enthusiasm or attention, much like "USA!". The chant involves one group shouting "Aussie, Aussie, Aussie!" and the crowd responding "Oi, Oi, Oi!".
(ˌdɒbərˈɪn ) noun. Australian slang. an informant or traitor. Sometimes shortened to: dobber.
synonyms: natal day. date, day of the month. the specified day of the month. noun. an anniversary of the day on which a person was born (or the celebration of it)
Quakers traditionally referred to Friday as "Sixth Day," eschewing the pagan origins of the name. In Slavic countries, it is called "Fifth Day" (Polish: piątek, Russian: пятница, pyatnitsa).
America writes dates as month, date, year, so in American English you would say my birthday is on August 10. In British English, dates are written date, month, year, so in British English you would say my birthday is on the tenth of August.
Following the solar year, the new calendar calculated a year to be 365 and ¼ days long. That year, 45 B.C., Caesar added 67 days so that the new year would begin on Jan. 1. The ancient Romans celebrated their New Year's Day with a feast for the god of doorways and beginnings, Janus.
Generally, in the US, we write June 2. June 2nd would be acceptable but a bit formal. June second or June the second would be even more formal.
📅 Different countries use different date formats largely due to historical conventions, cultural influences, and practical considerations. The main variations are day-month-year (DD/MM/YYYY), month-day-year (MM/DD/YYYY), and year-month-day (YYYY-MM-DD).