A: The Flag Code states it is the universal custom to display the flag only from sunrise to sunset on buildings and on stationary flag staffs in the open. However, when a patriotic effect is desired, the flag may be displayed twenty-four hours a day if properly illuminated during the hours of darkness. (Ref Flag Code6(a)) The American Legion interprets “proper illumination” as a light specifically placed to illuminate the flag (preferred) or having a light source sufficient to illuminate the flag so it is recognizable as such by the casual observer.