"dies Iouis" meaning in Latin

{
  "forms": [
    {
      "form": "diēs Iouis",
      "tags": [
        "canonical",
        "masculine"
      ]
    },
    {
      "form": "diēī Iouis",
      "tags": [
        "genitive"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "diēs<5.M> Iouis"
      },
      "expansion": "diēs Iouis m (genitive diēī Iouis); fifth declension",
      "name": "la-noun"
    }
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "diēs Iovis"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Latin entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Latin masculine nouns in the fifth declension",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "alternative typography of diēs Iovis"
      ],
      "id": "en-dies_Iouis-la-noun-bxkfP11x",
      "links": [
        [
          "diēs Iovis",
          "dies Iovis#Latin"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative",
        "declension-5"
      ]
    }
  ],
  "word": "dies Iouis"
}

{
  "forms": [
    {
      "form": "diēs Iouis",
      "tags": [
        "canonical",
        "masculine"
      ]
    },
    {
      "form": "diēī Iouis",
      "tags": [
        "genitive"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "diēs<5.M> Iouis"
      },
      "expansion": "diēs Iouis m (genitive diēī Iouis); fifth declension",
      "name": "la-noun"
    }
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "diēs Iovis"
        }
      ],
      "categories": [
        "Latin entries with incorrect language header",
        "Latin fifth declension nouns",
        "Latin lemmas",
        "Latin masculine nouns",
        "Latin masculine nouns in the fifth declension",
        "Latin multiword terms",
        "Latin nouns",
        "Latin nouns with red links in their inflection tables",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "alternative typography of diēs Iovis"
      ],
      "links": [
        [
          "diēs Iovis",
          "dies Iovis#Latin"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative",
        "declension-5"
      ]
    }
  ],
  "word": "dies Iouis"
}