"góðan daginn" meaning in Icelandic

{
  "head_templates": [
    {
      "args": {
        "1": "is",
        "2": "interjection",
        "head": "góðan daginn"
      },
      "expansion": "góðan daginn",
      "name": "head"
    }
  ],
  "lang": "Icelandic",
  "lang_code": "is",
  "pos": "intj",
  "related": [
    {
      "_dis1": "0 0",
      "word": "góðan dag"
    }
  ],
  "senses": [
    {
      "glosses": [
        "good day"
      ],
      "id": "en-góðan_daginn-is-intj-TLRVG7sk",
      "links": [
        [
          "good day",
          "good day"
        ]
      ]
    },
    {
      "categories": [
        {
          "_dis": "0 100",
          "kind": "other",
          "name": "Icelandic entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "0 100",
          "kind": "other",
          "name": "Icelandic entries with language name categories using raw markup",
          "parents": [
            "Entries with language name categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "0 100",
          "kind": "other",
          "name": "Icelandic phrasebook",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "0 100",
          "kind": "other",
          "name": "Icelandic terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "good morning"
      ],
      "id": "en-góðan_daginn-is-intj-zfcd6n13",
      "links": [
        [
          "good morning",
          "good morning"
        ]
      ]
    }
  ],
  "word": "góðan daginn"
}

{
  "categories": [
    "Icelandic entries with incorrect language header",
    "Icelandic entries with language name categories using raw markup",
    "Icelandic interjections",
    "Icelandic lemmas",
    "Icelandic multiword terms",
    "Icelandic phrasebook",
    "Icelandic terms with non-redundant non-automated sortkeys"
  ],
  "head_templates": [
    {
      "args": {
        "1": "is",
        "2": "interjection",
        "head": "góðan daginn"
      },
      "expansion": "góðan daginn",
      "name": "head"
    }
  ],
  "lang": "Icelandic",
  "lang_code": "is",
  "pos": "intj",
  "related": [
    {
      "word": "góðan dag"
    }
  ],
  "senses": [
    {
      "glosses": [
        "good day"
      ],
      "links": [
        [
          "good day",
          "good day"
        ]
      ]
    },
    {
      "glosses": [
        "good morning"
      ],
      "links": [
        [
          "good morning",
          "good morning"
        ]
      ]
    }
  ],
  "word": "góðan daginn"
}