"mufti day" meaning in English

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      "tags": [
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      "expansion": "mufti day (plural mufti days)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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      "categories": [
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          "kind": "other",
          "name": "Australian English",
          "parents": [],
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      "coordinate_terms": [
        {
          "tags": [
            "US"
          ],
          "word": "dress-down Friday"
        },
        {
          "word": "casual Friday"
        }
      ],
      "examples": [
        {
          "ref": "2012, David Walliams [pseudonym; David Edward Williams], Ratburger, London: HarperCollins Children’s Books, →ISBN:",
          "text": "“Is it Halloween already?”\n “Erm, no…” spluttered Zoe. “It’s, er, mufti day at school, you know, where you can wear whatever you like.”",
          "type": "quote"
        }
      ],
      "glosses": [
        "A day on which school pupils are allowed to wear casual clothes which would on any other day be against the school's uniform policy."
      ],
      "id": "en-mufti_day-en-noun-Jy10V01t",
      "links": [
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        [
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          "casual"
        ],
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          "clothes",
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        ],
        [
          "uniform",
          "uniform"
        ],
        [
          "policy",
          "policy"
        ]
      ],
      "raw_glosses": [
        "(Australia, British, New Zealand) A day on which school pupils are allowed to wear casual clothes which would on any other day be against the school's uniform policy."
      ],
      "synonyms": [
        {
          "word": "non-uniform day"
        },
        {
          "tags": [
            "Philippines"
          ],
          "word": "washday"
        }
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      "tags": [
        "Australia",
        "British",
        "New-Zealand"
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  "word": "mufti day"
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{
  "coordinate_terms": [
    {
      "tags": [
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      "word": "dress-down Friday"
    },
    {
      "word": "casual Friday"
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  "forms": [
    {
      "form": "mufti days",
      "tags": [
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      "expansion": "mufti day (plural mufti days)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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        "British English",
        "English countable nouns",
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        "New Zealand English",
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        {
          "ref": "2012, David Walliams [pseudonym; David Edward Williams], Ratburger, London: HarperCollins Children’s Books, →ISBN:",
          "text": "“Is it Halloween already?”\n “Erm, no…” spluttered Zoe. “It’s, er, mufti day at school, you know, where you can wear whatever you like.”",
          "type": "quote"
        }
      ],
      "glosses": [
        "A day on which school pupils are allowed to wear casual clothes which would on any other day be against the school's uniform policy."
      ],
      "links": [
        [
          "pupil",
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        [
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        ],
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          "uniform",
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        ],
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          "policy"
        ]
      ],
      "raw_glosses": [
        "(Australia, British, New Zealand) A day on which school pupils are allowed to wear casual clothes which would on any other day be against the school's uniform policy."
      ],
      "tags": [
        "Australia",
        "British",
        "New-Zealand"
      ],
      "wikipedia": [
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  "synonyms": [
    {
      "word": "non-uniform day"
    },
    {
      "tags": [
        "Philippines"
      ],
      "word": "washday"
    }
  ],
  "word": "mufti day"
}