Some veterans say Memorial Day began to be watered down more than four decades ago when Congress changed the date from its traditional May 30 to the last Monday in May to give people a three-day weekend. Arguing that transformed a solemn day of remembrance into one associated with leisure and recreation, veterans groups have long advocated a return to May 30. For years, the late Hawaii Sen. Daniel Inouye, a World War II veteran and Medal of Honor recipient, asked Congress to change it back, to no avail.