D-Day

The D stands for day; compare H-hour.

D-Day

1. (historical) 6 June 1944, the date when the Allies invaded western Europe in World War II.

• VE Day
• VJ Day
• X-Day
• Y-Day

D-Day (plural D-Days)

1. (figuratively, chiefly military) The date of any major event planned for the future.
   • 2023 April 2, Dan Sabbagh, Ed Ram, “Surrounded and outgunned, Ukraine’s tank crews prepare for battle of Bakhmut”, in The Guardian‎^[1], →ISSN:

     A Ukrainian D-day is expected in weeks.

• D-day

• X-Day

• H-hour

• Normandy landings on Wikipedia.Wikipedia
• D-Day (military term) on Wikipedia.Wikipedia

• Addy, Dady, addy, dyad