Saturday, May 20 is Armed Forces Day in the United States. It comes after Armed Forces Week and honors all five military branches: Army, Navy, Marine Corps, Air Force, and Coast Guard. Armed Forces Week begins the second Saturday of May and ends on the third Sunday of May. Armed Forces Day is always the third Saturday in May. Both Armed Forces Day and Armed Forces Week fall during Military Appreciation Month which includes Military Spouse Appreciation Day and Victory in Europe Day (V-E Day), according to Military.com.