What does it stand for?
Sort of… nothing? “The terms D-day and H-hour are used for the day and hour on which a combat attack or operation is to be initiated,” says the U.S. Army Center of Military History. “The letters are derived from the words for which they stand.”
So “D-Day” means… Day Day. It’s the day that it all happens.
Why is D-Day on the same day as Donut Day?
It isn’t always! This is just a coincidence. It’ll happen again in a few years. June 6, you see, is not always the first Friday is June. This is a problem that people have been trying to solve for a long time. It has something to do with the Earth tilting on its axis, I think. I’m not really sure. Check Wikipedia if you really care.
What is Friday?