The Full form of BDAY is birthday, or BDAY stands for birthday, or the full name of given abbreviation is birthday.
birthday is known as BDAY.
BDAY all full forms
All the above full forms are related to BDAY. A little information is given about one of these full forms. If you are not satisfied with the information given about 'birthday (BDAY)', then comment. Or if you know more about 'birthday (BDAY)', then write.