Headquarters Department of the Army is celebrating the Army's 243rd birthday during the week of 10-16 June 2018 with numerous ceremonies and events. Highlighted celebrations are Army Day with the Nationals on 10 June; Twilight Tattoo hosted by the Sergeant Major of the Army on 13 June; a wreath laying ceremony at Arlington National Cemetery on 14 June; the Pentagon Army Birthday Celebration also on 14 June; and culminating with the Army Birthday Ball on 16 June 2018.