In the time I've known you, you've never been much for celebrating your birthday.

[Not that Castiel understands the purpose of it, to begin with, it was more a celebration of surviving another year. Being that Dean so often didn't see his worth or refused to recognize his successes it was on-brand for him to not make much of a thing about his day of birth.]

I made an appearance but I knew you'd want some time to yourself when all was said and done.