Word.ws English Dictionary

Y-Day

Y-Day proper noun: 1 March 1946, the planned date for the Allied invasion of the Kantō Plain to conquer Tokyo in World War II (cancelled following Japan's unconditional surrender in September 1945).

Proper noun

Y-Day

  1. (historical) 1 March 1946, the planned date for the Allied invasion of the Kantō Plain to conquer Tokyo in World War II (cancelled following Japan's unconditional surrender in September 1945).

Questions about Y-Day

What does Y-Day mean?
Y-Day means 1 March 1946, the planned date for the Allied invasion of the Kantō Plain to conquer Tokyo in World War II (cancelled following Japan's unconditional surrender in September 1945).
What part of speech is Y-Day?
Y-Day is a proper noun.

Words near Y-Day in the dictionary

  1. y-
  2. y-axes
  3. y-axis
  4. Y-chromosome
  5. Y-chromosomes
  6. Y-Day
  7. y-direction
  8. y-front
  9. Y-fronted
  10. Y-fronts
  11. y-intercept

Source and license

Adapted from Wiktionary: Y-Day (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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