calendar business days derived

{
  "input": {
    "body": {
      "end": "2027-01-07",
      "start": "2027-01-01",
      "countries": [
        "GB-ENG",
        "DE-BY"
      ],
      "operation": "intersection"
    },
    "type": "http",
    "method": "POST",
    "bodyType": "json"
  },
  "output": {
    "type": "json",
    "example": {
      "asOf": "2026-09-30",
      "input": {
        "end": "2027-01-07",
        "start": "2027-01-01",
        "weekend": [
          6,
          7
        ],
        "countries": [
          "GB-ENG",
          "DE-BY"
        ],
        "operation": "intersection",
        "additionalClosures": []
      },
      "trace": [
        {
          "date": "2027-01-01",
          "reasons": [
            "holiday:GB-ENG",
            "holiday:DE-BY"
          ],
          "working": false
        },
        {
          "date": "2027-01-02",
          "reasons": [
            "weekend"
          ],
          "working": false
        },
        {
          "date": "2027-01-03",
          "reasons": [
            "weekend"
          ],
          "working": false
        },
        {
          "date": "2027-01-04",
          "reasons": [],
          "working": true
        },
        {
          "date": "2027-01-05",
          "reasons": [],
          "working": true
        },
        {
          "date": "2027-01-06",
          "reasons": [
            "holiday:DE-BY"
          ],
          "working": false
        },
        {
          "date": "2027-01-07",
          "reasons": [],
          "working": true
        }
      ],
      "result": {
        "date": null,
        "count": 3,
        "dates": [
          "2027-01-04",
          "2027-01-05",
          "2027-01-07"
        ]
      },
      "source": {
        "url": "https://github.com/vacanza/holidays",
        "asOf": "2026-09-30",
        "name": "Python holidays",
        "changes": "Public and observed holiday rules compiled into civil dates for 2024–2030 for all supported country/subdivision keys.",
        "license": "MIT",
        "version": "holidays@0.105",
        "licenseUrl": "https://github.com/vacanza/holidays/blob/v0.105/LICENSE",
        "attribution": "Python holidays contributors; see /calendar/coverage for the original licence and country-directory attribution."
      },
      "coverage": {
        "end": "2030-12-31",
        "start": "2024-01-01",
        "countries": [
          {
            "key": "GB-ENG",
            "name": "England",
            "scope": "subdivision",
            "emptyYears": [],
            "availableYears": [
              2024,
              2025,
              2026,
              2027,
              2028,
              2029,
              2030
            ]
          },
          {
            "key": "DE-BY",
            "name": "Bayern",
            "scope": "subdivision",
            "emptyYears": [],
            "availableYears": [
              2024,
              2025,
              2026,
              2027,
              2028,
              2029,
              2030
            ]
          }
        ],
        "holidayTypes": [
          "public"
        ],
        "authoritative": false
      },
      "holidays": [
        {
          "date": "2027-01-01",
          "names": [
            "New Year's Day"
          ],
          "country": "GB-ENG"
        },
        {
          "date": "2027-01-01",
          "names": [
            "New Year's Day"
          ],
          "country": "DE-BY"
        },
        {
          "date": "2027-01-06",
          "names": [
            "Epiphany"
          ],
          "country": "DE-BY"
        }
      ],
      "warnings": [
        "Community-maintained calendar rules are not authoritative. Local, employer, bank-only and emergency closures may be missing. Moon-sighting dates can differ. Verify critical schedules with the relevant authority.",
        "Weekend defaults to Saturday/Sunday for every country; supply weekend explicitly where different. Government-designated compensating working weekends are not applied.",
        "Public holidays affecting part of a day are conservatively treated as full-day closures."
      ],
      "operation": "intersection"
    }
  }
}