The military designation of days and hours within the North Atlantic Treaty Organisation (NATO), is specified in AAP-6 (STANAG 3680), NATO Glossary of Terms and Definitions, and marked (NATO) in what follows. Those entries marked (US) are specific to the U.S., and defined only in Joint Publication JP 1-02, Department of Defense Dictionary of Military and Associated Terms.
References to days (or hours) preceding or following a designated day (or hour) use a plus or minus sign and an Arabic numeral following the letter. For example, "D−3" is 3 days prior to D-day, "C+7" is 7 days after C-day, "H−2" is 2 hours before H-hour, and so forth. In less formal contexts, the time is usually spelled out, so that "D−3" becomes "D minus three" or "D minus 3".
H-hour was the name given to the airborne assault in the Battle of Normandy. It included the American 101st Airborne Division and 82nd Airborne Division With the British 6th Airborne Division. This took place about three hours before the main beach landings on the Normandy. The Airborne invasion consisted of over 50,000 men and around 1,200 planes and gliders. The combined assault of British and American Airborne and glider divisions would surprise the German defenders and cause enough havoc to make the beach landings go more smoothly. .
The divisions of paratroopers that landed each had an objective:
Dear John, I'm sorry I can't do this anymore
You're not the man I fell in love with
And I have to move on with my life, goodbye
Goodbye, goodbye, goodbye cool
You were the one who'd never leave
Beautiful eyes, you seemed so free
Touching your face I felt complete
Holding your hand my heart would weep
So everything that came out of your mouth was full of lies
You looked me right dead in the eyes
You'd call your girlfriends and tell them that I abused your trust
You did your best to demonize
You were the one who'd never leave
Beautiful eyes, you seemed so free
Touching your face I felt complete
Holding your hand my heart would weep
You were the one who raped my soul
Beautiful lies, you stole my hope
Touching your ass, I scratch the skin
Holding your neck, I tie the rope
(Pulling it tight)
You were the one who'd never leave
Beautiful eyes, you seemed so free
Touching your face I felt complete
Holding your hand my heart would weep
You were the one, the one for me
Now that you're gone it's hard to see
So much of me has gone away
There's no need to stay another day
But someone's got to pay
But someone's got to pay
But someone's got to pay
But someone's got to pay
But someone's got to pay
But someone's got to pay
But someone's got to pay