"Australia Day" meaning in English

{
  "head_templates": [
    {
      "args": {
        "head": "Australia Day"
      },
      "expansion": "Australia Day",
      "name": "en-proper noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "place",
          "langcode": "en",
          "name": "Australia",
          "orig": "en:Australia",
          "parents": [
            "Earth",
            "Oceania",
            "Nature",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Calendar",
          "orig": "en:Calendar",
          "parents": [
            "Timekeeping",
            "Time",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "26th January, Australia's National Day in commemoration of the foundation of the first settlement in 1788."
      ],
      "id": "en-Australia_Day-en-name-GrumNhLg",
      "links": [
        [
          "National Day",
          "National Day"
        ]
      ],
      "synonyms": [
        {
          "tags": [
            "derogatory"
          ],
          "word": "Invasion Day"
        }
      ],
      "wikipedia": [
        "Australia Day"
      ]
    }
  ],
  "word": "Australia Day"
}

{
  "head_templates": [
    {
      "args": {
        "head": "Australia Day"
      },
      "expansion": "Australia Day",
      "name": "en-proper noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English entries with topic categories using raw markup",
        "English lemmas",
        "English multiword terms",
        "English proper nouns",
        "English terms with non-redundant non-automated sortkeys",
        "English uncountable nouns",
        "en:Australia",
        "en:Calendar"
      ],
      "glosses": [
        "26th January, Australia's National Day in commemoration of the foundation of the first settlement in 1788."
      ],
      "links": [
        [
          "National Day",
          "National Day"
        ]
      ],
      "wikipedia": [
        "Australia Day"
      ]
    }
  ],
  "synonyms": [
    {
      "tags": [
        "derogatory"
      ],
      "word": "Invasion Day"
    }
  ],
  "word": "Australia Day"
}