United States Army situation map for 2400 hours, 6 June 1944, the first day of the Normandy Landings, popularly known as "D-Day". The assault was conducted in two phases: an air assault landing of American, British and Canadian airborne troops shortly after midnight, and an amphibious landing of Allied infantry and armoured divisions on the coast of France commencing at 06:30 British Double Summer TimeMap credit: Twelfth United States Army Group