Memorial Day is a federal holiday dedicated to the memory of all those in the U.S. Armed Forces who have died while serving their country. It is celebrated on the final Monday of every May and has been a federal holiday since 1967. This holiday has roots in traditions observed during the summer months when families gathered for reunions and picnics. After the Civil War, the tradition was adapted to a national holiday named Decoration Day to honor fallen soldiers. Over time, the name was changed to Memorial Day. With the end of World War I, the scope of those honored was expanded to include all American wars.