My parents-in-law celebrate their birthdays on the King and Queen's birthdays, Mother's Day and Father's Day. Actually they don't even know when their real birthdays are, on both of their identity cards it just gave the year where on other people's IDs it gives a full date. Even then there is some discussion if it is the correct year, my mother-in-law who died last year claimed to be older than the year on her ID and my father-in-law older than her despite his ID saying he was born 5 years after her. My stepson has had all his classmates around after school on most of his birthdays since I've known his mother. David