What does D Day stand for from World War 2?
There were many D days and H hours during WWII. Every invasion had a D day, the day of the invasion, and an H hour, the time of the invasion. there was a D day for the invasion of Guadalcanal, Sicily, Anzio, Iwo Jima and Okinawa. The one we remember as D day was the invasion of Normandy, 6 June 1944.