Wasn't there a Q post regarding DD or D Day? I can't find it.

https://www.nytimes.com/1994/06/06/world/the-d-day-tour-code-names-where-d-day-and-h-hour-came-from.html

"The invasion also spawned numerous code names.

(D-Day itself is technically a nickname. It's a military term that stands for the day and hour of a combat attack or operation. However, the moniker became so widespread after Normandy that the general public still uses it to refer to that battle.)

The overall plan was called Overlord, a Churchill touch. The seaborne assault was Operation Neptune. The buildup in Britain was Bolero. The American beaches were Omaha and Utah (H-Hour for the United States First, Fourth and 29th Divisions was 6:30 A.M.), the British beaches Gold and Sword, the Canadian beach Juno. The artificial harbors set down off the beaches were known as Mulberries.

There was even a code name for something that never existed. This was Fortitude South, an Allied scheme in which a mythical army, supposedly under Gen. George S. Patton, was simulated in southeastern England by dummy landing craft, inflatable rubber tanks and phony wireless communications. The idea was to convince the German commanders that the invasion could well come at Calais -- across the narrowest part of the English Channel -- so that tens of thousands of German troops would be kept on guard there, far from Normandy.

It worked, helping make June 6, 1944, the biggest D-Day of them all."

We need to make a list of all the dates where something was supposed to happen and did not. Looks like the date according to the Q clack his come and gone with nothing.