Rhetorical Question: Why would they make any future statement about Birthdays, Mother's Day, Thanksgiving, or any of the other things we are thinking of?
They already told you that a mature person doesn't need to reach for mommy's hand to cross the street. They told you a mature Christian only needs principles. We should all take them at their word. Celebrate what you want to.
Per Lett's rule #2; keep it to yourself. Don't broadcast.