birthday

As nouns the difference between nativity and birthday

is that nativity is someone's birth; the place, time and circumstances of a birth while birthday is the anniversary of the day on which someone is born.

As nouns the difference between birthday and birthday

is that birthday is the anniversary of the day on which someone is born while birthday is the anniversary of the day on which someone is born.

As nouns the difference between taxonomy and birthday

is that taxonomy is the science or the technique used to make a classification while birthday is the anniversary of the day on which someone is born.

As a noun birthday

is the anniversary of the day on which someone is born.

As an adjective birthdayless is

(rare) without a birthday, or with no celebration on that day.

As a noun birthday

is the anniversary of the day on which someone is born.

As a proper noun mawlid is

an islamic festival (mawlid) marking the birth of muhammad.

As a noun birthday

is the anniversary of the day on which someone is born.

As an adjective natalitial is

(rare) pertaining to a birthday.