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Definitions

H-hour

[eych-ouuhr, -ou-er] / ˈeɪtʃˌaʊər, -ˌaʊ ər /
NOUN
target date
Synonyms
WEAK
A-day D-day deadline target day term terminal date time allotment time frame zero hour
NOUN
zero hour
Synonyms
WEAK
A-day D-day 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.

Stormed Utah Beach at H-hour on D-Day as part of the 4th Infantry Division.

From Washington Post

I asked Sadat how he compared this moment with the H-hour on Oct.

From Time Magazine Archive

Then they synchronized their watches and headed for the store, took their positions, and waited impatiently for H-hour.

From Time Magazine Archive

Long before H-hour, millions of expectant televiewers across the U.S. were gathered around their sets.

From Time Magazine Archive

We breathed the standard helium-oxygen mix at normal pressure until about four hours before H-hour.

From The Trouble with Telstar by Schoenherr, John