Susan is a "stickler" for celebrating birthday's - ON THE DAY. So when a conflict appears there is the challenge of prioritization. Not having this point of view - I always felt the birthday is just another day in journey of life - no different than yesterday. That could be more of a male view since we are a bystander in the process of birth.
We celebrate many holidays for famous birthdays/beginnings - President's Day, Martin Luther King, 4th of July (Birth of a Nation), and Christmas. Notice President's Day, and Martin Luther King violates the Susan rule - ON THE DAY!
Susan is ON THE cruise - ON THE Birthday. So I guess I'm off the hook for the celebration :)
Happy Virtual Birthday Susan!