English word origin

Etymology of D-Day

The D stands for day; compare H-hour.

2 source sectionsBrief source recordWiktionary original ↗

In this entry · 2 source sections

The source etymologies

Wiktionary via Kaikki / Wiktextract

The source reports below are imported and unreviewed by *SET-U. Separate numbered origins and differing source variants are preserved; agreement within this extraction is not independent corroboration.

Unnumbered source etymology · variant 1/2

Original entry ↗

name

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

Selected source glosses provide context, not a complete modern definition inventory

The D stands for day; compare H-hour.

Inspect preserved source fields

Raw extraction fields are retained for auditing. Their order does not establish ancestry.

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        "borrowed"
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Unnumbered source etymology · variant 2/2

Original entry ↗

noun

The date of any major event planned for the future.

Selected source glosses provide context, not a complete modern definition inventory

The D stands for day; compare H-hour.

Inspect preserved source fields

Raw extraction fields are retained for auditing. Their order does not establish ancestry.

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    ],
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      "H-hour",
      "H-hour#English"
    ]
  ],
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Where this record stops

This page does not supply an independently verified sound-change sequence, first-use manuscript or complete family tree unless a cited analysis explicitly establishes one. Missing detail here is a limit of this record—not a claim that humanity knows nothing more.

An older meaning does not determine what a word must mean today. Follow the sources, preserve disagreements, and keep ancestry separate from interpretation.

Contribute located evidence for D-Day →

Source and snapshot

Imported from Wiktionary contributors; extracted by Tatu Ylonen / Wiktextract / Kaikki.org. Selected fields are reformatted and grouped; wording, source identity and etymology sections are retained. CC-BY-SA-4.0 applies to the imported source material.

Dump: 2026-10-01 · Extracted: 2026-10-30. These are snapshot dates, not the word’s first attestation or the page’s revision date.

Source entry and bibliography ↗Wiktionary revision history ↗Acquisition and rights ledger

Machine-source provenance

Source SHA-256: 5ff2c072f8099f2d2ce484bd6957bf179f046d2ad37bc36555edf8bb84cb5291
Import run: 73216b9a9b78ed3830994bf853103716f5a4dc57099e371e9f8fdc468facca26
Permanent entry ID: w-RC1EYXk