Boxing Day was originally the servants' celebration and holiday December 26 -- they all worked Christmas Day and the following day received a "box" with a Christmas cash tip/gift while the family took over many of their regular job duties. Boxing Day gifts in boxes were also given to many service people (fishmonger, milkman, postman etc) who delivered goods to the home. Now Boxing Day is mostly about post-Christmas discount sales . . . nothing to do with "boxing" as is putting on the boxing gloves however.