birthnight

[ burth-nahyt ]
/ ˈbɜrθˌnaɪt /

noun

the night of a person's birth, especially a birthday celebration for royalty.
the anniversary of such a date.
the celebration of a royal birthday.

Origin of birthnight

First recorded in 1620–30; birth + night
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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