Father's Day or Son Day

At church Tanner turns to me and says "mom today is Father's Day but why isn't it Sunday". I said "Tanner it is Sunday. You know that." He says "no it should be SON day today shouldn't it (and he pointed to himself)?" I started to laugh. He says "I think we should have a son day because there is Father's Day and Mother's Day." I said "that would be nice". He says "I want SON day to be Tuesday okay?" What a character