"running day" meaning in English

{
  "forms": [
    {
      "form": "running days",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "running day (plural running days)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "glosses": [
        "Any of the days occupied on a voyage, etc., under a charter, including Sundays."
      ],
      "id": "en-running_day-en-noun-W8eSTJdz",
      "links": [
        [
          "voyage",
          "voyage"
        ],
        [
          "charter",
          "charter"
        ],
        [
          "Sunday",
          "Sunday"
        ]
      ]
    },
    {
      "categories": [
        {
          "_dis": "42 58",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "text": "The bus museum's next running day is August 12. Come along and enjoy a ride on one of our vintage buses!"
        }
      ],
      "glosses": [
        "A day on which vehicles, locomotives, etc., are run or driven, especially when these are otherwise kept or exhibited statically, such as at a museum."
      ],
      "id": "en-running_day-en-noun-Z5JOvIZz"
    }
  ],
  "word": "running day"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English nouns"
  ],
  "forms": [
    {
      "form": "running days",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "running day (plural running days)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "glosses": [
        "Any of the days occupied on a voyage, etc., under a charter, including Sundays."
      ],
      "links": [
        [
          "voyage",
          "voyage"
        ],
        [
          "charter",
          "charter"
        ],
        [
          "Sunday",
          "Sunday"
        ]
      ]
    },
    {
      "examples": [
        {
          "text": "The bus museum's next running day is August 12. Come along and enjoy a ride on one of our vintage buses!"
        }
      ],
      "glosses": [
        "A day on which vehicles, locomotives, etc., are run or driven, especially when these are otherwise kept or exhibited statically, such as at a museum."
      ]
    }
  ],
  "word": "running day"
}