1 the organism's functional role in the community (e.g. TROPHIC LEVEL).  other conditions of the organism's existence, such as preferred temperature, moisture and pH, combining spatial habitat with functional interaction with other species.
birthday(Noun) The anniversary of the day on which someone is born. birthday(Noun) The anniversary of the day on which something is created. birthday(Noun) The date on which someone is born or something is created, more commonly called birthdate or date of birth.
USA- English (Southern) As your birthday is the anniversary of your birth, it is just the day and month. Your date of birth will include the full year. As for prepositions, I think you have two options for answering When is your birthday?: 1) It's on January 22nd. 2) January 22nd..