Mila, I'm struggling with whether to say anything or not for Father's Day, myself. My H didn't acknowledge Mother's Day either except to tell D11 that since it was Mother's Day she should be home with me instead of seeing him for his weekly visit.
The children didn't do anything for him as he is out of town on vacation again. They figured he wasn't concerned enough about seeing them on Father's Day that they'd just text him to tell him, Happy Father's Day.
This is so strange as I used to love helping make this day special for him.
I may text him the message that CW suggested as I am blessed with our children.