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Definitions

D-day

[dee-dey] / ˈdiˌdeɪ /
NOUN
target date
Synonyms
WEAK
A-day H-hour deadline target day term terminal date time allotment time frame zero hour
NOUN
zero hour
Synonyms
WEAK
A-day H-hour appointed hour climax contingency countdown crisis crisis point crossroad crossroads crunch time deadline emergency exigency jumping-off point juncture moment of truth pinch pivotal moment start time strait target target day the time turning point vital moment

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The beginning of the end of World War II occurred 80 years ago Thursday, when roughly 160,000 Allied troops made landfall in Normandy on D-day.

From Los Angeles Times • Jun. 6, 2024

Mr Gething said he "could and should, in my view, have been elsewhere" - that is likely to be a reference to the D-day commemoration in Portsmouth that he cannot attend because of the debate.

From BBC • Jun. 4, 2024

In late 2020, as Flash D-day drew near, supporters scrambled to rescue it.

From Slate • Feb. 5, 2021

He likened Saturday’s announcement to D-day, the turning point in World War II.

From Los Angeles Times • Dec. 12, 2020

Danny Akee always seemed to have a funny story to tell, even about D-day on Saipan.

From "Code Talker: A Novel About the Navajo Marines of World War Two" by Joseph Bruchac