Birthday

n. day of birth, day of nativity

It is customary in many cultures to celebrate the anniversary of one's birthday, for example by having a birthday party with family and/or friends. Gifts are often given to the person celebrating the birthday. It is also customary to treat people specially on their birthday, either generally acceding to their wishes, or subjecting them to a rite of transition.
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Noun
1. an anniversary of the day on which a person was born (or the celebration of it)
(hypernym) anniversary, day of remembrance
2. the date on which a person was born
(synonym) natal day
(hypernym) date, day of the month

(n.)
The day of the month in which a person was born, in whatever succeeding year it may recur; the anniversary of one's birth.
  

(n.)
The day in which any person is born; day of origin or commencement.
  

(a.)
Of or pertaining to the day of birth, or its anniversary; as, birthday gifts or festivities.
  

To dream of a birthday is a signal of poverty and falsehood to the young, to the old, long trouble and desolation.