English

Alternative forms

• H-Hour

Noun

H-hour ‎(plural H-hours)

1. (figuratively) The hour at which any major event planned for the future is set to begin, as used in United States military.
   • What does the "D" signify in D-Day, and the "H" signify in H-Hour?

Synonyms

• zero hour

Translations

Coordinate terms

(figurative):

• D-Day
• X-Day