Definition of official birthday in English:

official birthday

Line breaks: of|fi¦cial birth|day

noun

(In the UK) a day in June chosen for observing the sovereign’s birthday.
More example sentences
  • While the service rounds off a weekend of celebrations, the main focus of public commemorations for the sovereign's birthday will be in June, around her official birthday.
  • The Queen thus has three birthdays: her actual birthday, her official birthday, and her official birthday in Western Australia.
  • As well as marking her official birthday with the annual Trooping the Colour on June 17, the Queen will attend a St Paul's Cathedral service on June 15.

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