I'm writing this for a friend.
My friends BIL and SIL to be have announced their wedding date for his birthday this year.
It's not a big deal if it were just one day, however In-laws are big anniversary celebration types.
And... every year from now until forever this day will not be his birthday, but BIL & SIL wedding anniversary.
(my friends in laws have a history of ignoring my friends preferences, and his family are abroad)
Is he being unreasonable to refuse to go to the wedding and come to our house for birthday cake instead?