Father's Day AKA Daddy - O Day is on its way! This cool way of addressing your Pop came from the 1958 B film entitled 'Daddy-O' (of course). John Williams wrote his very first score for this film.
The music is called 'crime jazz' because it is similar to the music heard on TV detective shows of the period. Never heard of John Williams? He also wrote the scores for teeny weeny films like Stars Wars and Indiana Jones!
Forget the lousy neck tie you were planning on springing for! A vintage postcard would be a much nicer gift for Daddy - O Day!