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Birthday
A birthday is the anniversary of the birth of a person, or figuratively of an institution. Birthdays of people are celebrated in numerous cultures, often with birthday gifts, birthday cards, a birthday party, or a rite of passage.
Many religions celebrate the birth of their founders or religious figures with special holidays (e.g. Christmas, Mawlid, Buddha’s Birthday, and Krishna Janmashtami).
There is a distinction between birthday and birthdate: The former, other than February 29, occurs each year (e.g. January 15), while the latter is the exact date a person was born (e.g., January 15, 2001).
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Birthdate (noun)
the year, month, and day of someone’s birth; date of birth
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Birthday (noun)
The anniversary of the day on which someone is born. From 1570s
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Birthday (noun)
The anniversary of the day on which something is created.
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Birthday (noun)
The date on which someone is born or something is created, more commonly called birthdate or date of birth.
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Birthday (verb)
To celebrate one’s birthday.
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Birthday (noun)
the anniversary of the day on which a person was born, typically treated as an occasion for celebration and the giving of gifts
“his twenty-ninth birthday”
“a birthday cake”
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Birthday (noun)
the day of a person’s birth
“he shares a birthday with Rod Stewart”
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Birthday (noun)
the anniversary of something’s origin or foundation
“the seventy-fifth birthday of the Institute”