My father doesn't answer birthday or Father's Day messages. When we were kids he often railed against attempts to give cards & handmade gifts. "If you want to give me a gift just be better children", as he put it one year.
He is an emotionally limited person who plays at niceness but needs everything on his terms.
Still, I focus on the lessons in humanity learned from him.
And one is *deep* thanks to all the father figures who provide integrity in their care. Happy Father's Day to all of you.