What does D-Day stand for?

D-Day stands for "The unnamed day on which an operation begins or is to begin"

How to abbreviate "The unnamed day on which an operation begins or is to begin"?

"The unnamed day on which an operation begins or is to begin" can be abbreviated as D-Day

What is the meaning of D-Day abbreviation?

The meaning of D-Day abbreviation is "The unnamed day on which an operation begins or is to begin"

What does D-Day mean?

D-Day as abbreviation means "The unnamed day on which an operation begins or is to begin"