The word "birthday" refers to the annual celebration of the day on which a person was born. It is a special occasion that is typically marked with parties, gifts, and other festivities. People often celebrate their birthdays with friends and family, and it's common to receive well-wishes and blessings on this day.
The word "birthday" comes from the combination of "birth," which is derived from the Old Norse word "burthr," meaning "to be born," and "day," which originates from the Old English "dæg" meaning "day." Thus, a birthday literally means the day of birth.