Honestly, nothing brother. Both my fathers have never liked Father's Day so we just don't celebrate it. For Papa I just buy him stuff I know he likes and needs on a regular basis and make sure to go visit and call him often. Dad's not around any more so I usually just think out loud when I'm alone and I've got problems and basically make up one-sided conversations with his personality in mind until I figure it out lol. Mother's Day is a whole-ass production though. Death be upon the betrayers who forget.