"何日" meaning in Japanese

{
  "forms": [
    {
      "form": "何日",
      "ruby": [
        [
          "何",
          "なん"
        ],
        [
          "日",
          "にち"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "nannichi",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "pronoun",
        "2": "なんにち"
      },
      "expansion": "何(なん)日(にち) • (nannichi)",
      "name": "ja-pos"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "pron",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Japanese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese entries with language name categories using raw markup",
          "parents": [
            "Entries with language name categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese interrogative pronouns",
          "parents": [
            "Interrogative pronouns",
            "Interrogative pro-forms",
            "Pronouns",
            "Pro-forms",
            "Lemmas",
            "Terms by semantic function"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese links with redundant wikilinks",
          "parents": [
            "Links with redundant wikilinks",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese pronouns",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with redundant sortkeys",
          "parents": [
            "Terms with redundant sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "which day; how many days (question)"
      ],
      "id": "en-何日-ja-pron-Jeqkx5Nr",
      "links": [
        [
          "which",
          "which"
        ],
        [
          "day",
          "day"
        ],
        [
          "how many",
          "how many"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[nã̠ɲ̟ɲ̟it͡ɕi]"
    }
  ],
  "word": "何日"
}

{
  "forms": [
    {
      "form": "何日",
      "ruby": [
        [
          "何",
          "なん"
        ],
        [
          "日",
          "にち"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "nannichi",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "pronoun",
        "2": "なんにち"
      },
      "expansion": "何(なん)日(にち) • (nannichi)",
      "name": "ja-pos"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "pron",
  "senses": [
    {
      "categories": [
        "Japanese entries with incorrect language header",
        "Japanese entries with language name categories using raw markup",
        "Japanese interrogative pronouns",
        "Japanese lemmas",
        "Japanese links with redundant wikilinks",
        "Japanese pronouns",
        "Japanese terms spelled with first grade kanji",
        "Japanese terms spelled with second grade kanji",
        "Japanese terms with IPA pronunciation",
        "Japanese terms with non-redundant non-automated sortkeys",
        "Japanese terms with redundant sortkeys",
        "Japanese terms written with two Han script characters"
      ],
      "glosses": [
        "which day; how many days (question)"
      ],
      "links": [
        [
          "which",
          "which"
        ],
        [
          "day",
          "day"
        ],
        [
          "how many",
          "how many"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[nã̠ɲ̟ɲ̟it͡ɕi]"
    }
  ],
  "word": "何日"
}

{
  "called_from": "parser/1336",
  "msg": "no corresponding start tag found for </span>",
  "path": [
    "何日"
  ],
  "section": "Japanese",
  "subsection": "pronoun",
  "title": "何日",
  "trace": ""
}