Hey Sydney some interesting history
Memorial Day was originally known as Decoration Day. The current name for this day did not come into use until after World War II. Decoration Day and then Memorial Day used to be held on May 30, regardless of the day of the week, on which it fell. In 1968, the Uniform Holidays Bill was passed as part of a move to use federal holidays to create three-day weekends. This meant that that, from 1971, Memorial Day holiday has been officially observed on the last Monday in May. However, it took a longer period for all American states to recognize the new date.