{
  "schemaVersion": 1,
  "description": "Synthetic airport-local itineraries for independent algorithm comparison; not timetabled services. The 30 primary cases exclude the reviewer holdout.",
  "profile": {
    "bedtime": "23:00",
    "wake": "07:00",
    "prepDays": 3,
    "pace": "comfortable",
    "caffeine": true,
    "naps": true,
    "melatonin": false,
    "magnesium": false
  },
  "scenarios": [
    {
      "id": "S01",
      "category": "single",
      "name": "Pacific coast to London overnight",
      "referenceUTC": "2026-10-03T01:00:00Z",
      "finalRecoveryDays": 7,
      "intendedStressors": [
        "eastward",
        "overnight",
        "eight-hour-offset"
      ],
      "legs": [
        {
          "origin": "SFO",
          "originZone": "America/Los_Angeles",
          "destination": "LHR",
          "destinationZone": "Europe/London",
          "departureLocal": "2026-10-05T18:00:00",
          "arrivalLocal": "2026-10-06T12:00:00",
          "departureUTC": "2026-10-06T01:00:00Z",
          "arrivalUTC": "2026-10-06T11:00:00Z"
        }
      ]
    },
    {
      "id": "S02",
      "category": "single",
      "name": "London to New York daytime",
      "referenceUTC": "2026-10-09T09:00:00Z",
      "finalRecoveryDays": 7,
      "intendedStressors": [
        "westward",
        "daytime",
        "same-local-date"
      ],
      "legs": [
        {
          "origin": "LHR",
          "originZone": "Europe/London",
          "destination": "JFK",
          "destinationZone": "America/New_York",
          "departureLocal": "2026-10-12T10:00:00",
          "arrivalLocal": "2026-10-12T13:00:00",
          "departureUTC": "2026-10-12T09:00:00Z",
          "arrivalUTC": "2026-10-12T17:00:00Z"
        }
      ]
    },
    {
      "id": "S03",
      "category": "single",
      "name": "Los Angeles to Tokyo skipped date",
      "referenceUTC": "2026-10-10T18:00:00Z",
      "finalRecoveryDays": 7,
      "intendedStressors": [
        "date-line-westbound",
        "large-offset",
        "overnight"
      ],
      "legs": [
        {
          "origin": "LAX",
          "originZone": "America/Los_Angeles",
          "destination": "NRT",
          "destinationZone": "Asia/Tokyo",
          "departureLocal": "2026-10-13T11:00:00",
          "arrivalLocal": "2026-10-14T15:00:00",
          "departureUTC": "2026-10-13T18:00:00Z",
          "arrivalUTC": "2026-10-14T06:00:00Z"
        }
      ]
    },
    {
      "id": "S04",
      "category": "single",
      "name": "Tokyo to Los Angeles earlier local arrival",
      "referenceUTC": "2026-10-12T08:00:00Z",
      "finalRecoveryDays": 7,
      "intendedStressors": [
        "date-line-eastbound",
        "repeated-clock-hours",
        "same-local-date"
      ],
      "legs": [
        {
          "origin": "NRT",
          "originZone": "Asia/Tokyo",
          "destination": "LAX",
          "destinationZone": "America/Los_Angeles",
          "departureLocal": "2026-10-15T17:00:00",
          "arrivalLocal": "2026-10-15T11:00:00",
          "departureUTC": "2026-10-15T08:00:00Z",
          "arrivalUTC": "2026-10-15T18:00:00Z"
        }
      ]
    },
    {
      "id": "S05",
      "category": "single",
      "name": "New York to Delhi long overnight",
      "referenceUTC": "2026-10-08T01:00:00Z",
      "finalRecoveryDays": 7,
      "intendedStressors": [
        "half-hour-zone",
        "long-flight",
        "eastward"
      ],
      "legs": [
        {
          "origin": "JFK",
          "originZone": "America/New_York",
          "destination": "DEL",
          "destinationZone": "Asia/Kolkata",
          "departureLocal": "2026-10-10T21:00:00",
          "arrivalLocal": "2026-10-11T21:00:00",
          "departureUTC": "2026-10-11T01:00:00Z",
          "arrivalUTC": "2026-10-11T15:30:00Z"
        }
      ]
    },
    {
      "id": "S06",
      "category": "single",
      "name": "Delhi to Kathmandu small phase shift",
      "referenceUTC": "2026-11-05T02:30:00Z",
      "finalRecoveryDays": 7,
      "intendedStressors": [
        "quarter-hour-zone",
        "fifteen-minute-offset",
        "short-flight"
      ],
      "legs": [
        {
          "origin": "DEL",
          "originZone": "Asia/Kolkata",
          "destination": "KTM",
          "destinationZone": "Asia/Kathmandu",
          "departureLocal": "2026-11-08T08:00:00",
          "arrivalLocal": "2026-11-08T09:45:00",
          "departureUTC": "2026-11-08T02:30:00Z",
          "arrivalUTC": "2026-11-08T04:00:00Z"
        }
      ]
    },
    {
      "id": "S07",
      "category": "single",
      "name": "Sydney to Adelaide early departure",
      "referenceUTC": "2026-10-14T20:00:00Z",
      "finalRecoveryDays": 7,
      "intendedStressors": [
        "half-hour-zone",
        "thirty-minute-offset",
        "early-departure"
      ],
      "legs": [
        {
          "origin": "SYD",
          "originZone": "Australia/Sydney",
          "destination": "ADL",
          "destinationZone": "Australia/Adelaide",
          "departureLocal": "2026-10-18T07:00:00",
          "arrivalLocal": "2026-10-18T08:35:00",
          "departureUTC": "2026-10-17T20:00:00Z",
          "arrivalUTC": "2026-10-17T22:05:00Z"
        }
      ]
    },
    {
      "id": "S08",
      "category": "single",
      "name": "Singapore to Tokyo near midnight",
      "referenceUTC": "2026-10-17T15:55:00Z",
      "finalRecoveryDays": 7,
      "intendedStressors": [
        "near-midnight-departure",
        "short-overnight",
        "one-hour-offset"
      ],
      "legs": [
        {
          "origin": "SIN",
          "originZone": "Asia/Singapore",
          "destination": "HND",
          "destinationZone": "Asia/Tokyo",
          "departureLocal": "2026-10-20T23:55:00",
          "arrivalLocal": "2026-10-21T07:45:00",
          "departureUTC": "2026-10-20T15:55:00Z",
          "arrivalUTC": "2026-10-20T22:45:00Z"
        }
      ]
    },
    {
      "id": "S09",
      "category": "single",
      "name": "Auckland to Honolulu previous-date arrival",
      "referenceUTC": "2026-10-30T23:00:00Z",
      "finalRecoveryDays": 7,
      "intendedStressors": [
        "date-line-eastbound",
        "previous-local-date",
        "twenty-three-hour-civil-offset"
      ],
      "legs": [
        {
          "origin": "AKL",
          "originZone": "Pacific/Auckland",
          "destination": "HNL",
          "destinationZone": "Pacific/Honolulu",
          "departureLocal": "2026-11-03T12:00:00",
          "arrivalLocal": "2026-11-02T22:45:00",
          "departureUTC": "2026-11-02T23:00:00Z",
          "arrivalUTC": "2026-11-03T08:45:00Z"
        }
      ]
    },
    {
      "id": "S10",
      "category": "single",
      "name": "Sao Paulo to Lisbon during European DST change",
      "referenceUTC": "2026-10-21T23:00:00Z",
      "finalRecoveryDays": 7,
      "intendedStressors": [
        "dst-during-flight",
        "southern-to-northern-hemisphere",
        "overnight"
      ],
      "legs": [
        {
          "origin": "GRU",
          "originZone": "America/Sao_Paulo",
          "destination": "LIS",
          "destinationZone": "Europe/Lisbon",
          "departureLocal": "2026-10-24T20:00:00",
          "arrivalLocal": "2026-10-25T09:30:00",
          "departureUTC": "2026-10-24T23:00:00Z",
          "arrivalUTC": "2026-10-25T09:30:00Z"
        }
      ]
    },
    {
      "id": "R01",
      "category": "round",
      "name": "San Francisco and Paris ten-day visit",
      "referenceUTC": "2026-09-28T23:00:00Z",
      "finalRecoveryDays": 7,
      "intendedStressors": [
        "long-stay",
        "midday-return",
        "return-preparation"
      ],
      "legs": [
        {
          "origin": "SFO",
          "originZone": "America/Los_Angeles",
          "destination": "CDG",
          "destinationZone": "Europe/Paris",
          "departureLocal": "2026-10-01T16:00:00",
          "arrivalLocal": "2026-10-02T11:45:00",
          "departureUTC": "2026-10-01T23:00:00Z",
          "arrivalUTC": "2026-10-02T09:45:00Z"
        },
        {
          "origin": "CDG",
          "originZone": "Europe/Paris",
          "destination": "SFO",
          "destinationZone": "America/Los_Angeles",
          "departureLocal": "2026-10-12T14:00:00",
          "arrivalLocal": "2026-10-12T16:30:00",
          "departureUTC": "2026-10-12T12:00:00Z",
          "arrivalUTC": "2026-10-12T23:30:00Z"
        }
      ]
    },
    {
      "id": "R02",
      "category": "round",
      "name": "New York and London thirty-six-hour visit",
      "referenceUTC": "2026-10-05T23:00:00Z",
      "finalRecoveryDays": 7,
      "intendedStressors": [
        "short-stay",
        "incomplete-adaptation",
        "competing-targets"
      ],
      "legs": [
        {
          "origin": "JFK",
          "originZone": "America/New_York",
          "destination": "LHR",
          "destinationZone": "Europe/London",
          "departureLocal": "2026-10-08T19:00:00",
          "arrivalLocal": "2026-10-09T07:00:00",
          "departureUTC": "2026-10-08T23:00:00Z",
          "arrivalUTC": "2026-10-09T06:00:00Z"
        },
        {
          "origin": "LHR",
          "originZone": "Europe/London",
          "destination": "JFK",
          "destinationZone": "America/New_York",
          "departureLocal": "2026-10-10T19:00:00",
          "arrivalLocal": "2026-10-10T22:00:00",
          "departureUTC": "2026-10-10T18:00:00Z",
          "arrivalUTC": "2026-10-11T02:00:00Z"
        }
      ]
    },
    {
      "id": "R03",
      "category": "round",
      "name": "Sydney and Los Angeles across the date line",
      "referenceUTC": "2026-11-01T00:00:00Z",
      "finalRecoveryDays": 7,
      "intendedStressors": [
        "date-line-both-directions",
        "long-flight",
        "skipped-return-date"
      ],
      "legs": [
        {
          "origin": "SYD",
          "originZone": "Australia/Sydney",
          "destination": "LAX",
          "destinationZone": "America/Los_Angeles",
          "departureLocal": "2026-11-04T11:00:00",
          "arrivalLocal": "2026-11-04T06:00:00",
          "departureUTC": "2026-11-04T00:00:00Z",
          "arrivalUTC": "2026-11-04T14:00:00Z"
        },
        {
          "origin": "LAX",
          "originZone": "America/Los_Angeles",
          "destination": "SYD",
          "destinationZone": "Australia/Sydney",
          "departureLocal": "2026-11-11T22:00:00",
          "arrivalLocal": "2026-11-13T08:00:00",
          "departureUTC": "2026-11-12T06:00:00Z",
          "arrivalUTC": "2026-11-12T21:00:00Z"
        }
      ]
    },
    {
      "id": "R04",
      "category": "round",
      "name": "Dubai and Delhi overnight visit",
      "referenceUTC": "2026-11-02T05:00:00Z",
      "finalRecoveryDays": 7,
      "intendedStressors": [
        "half-hour-zone",
        "sixteen-hour-stay",
        "early-return"
      ],
      "legs": [
        {
          "origin": "DXB",
          "originZone": "Asia/Dubai",
          "destination": "DEL",
          "destinationZone": "Asia/Kolkata",
          "departureLocal": "2026-11-05T09:00:00",
          "arrivalLocal": "2026-11-05T13:30:00",
          "departureUTC": "2026-11-05T05:00:00Z",
          "arrivalUTC": "2026-11-05T08:00:00Z"
        },
        {
          "origin": "DEL",
          "originZone": "Asia/Kolkata",
          "destination": "DXB",
          "destinationZone": "Asia/Dubai",
          "departureLocal": "2026-11-06T06:00:00",
          "arrivalLocal": "2026-11-06T08:15:00",
          "departureUTC": "2026-11-06T00:30:00Z",
          "arrivalUTC": "2026-11-06T04:15:00Z"
        }
      ]
    },
    {
      "id": "R05",
      "category": "round",
      "name": "London and New York across both DST transitions",
      "referenceUTC": "2026-10-19T13:00:00Z",
      "finalRecoveryDays": 7,
      "intendedStressors": [
        "dst-during-stay",
        "different-dst-dates",
        "changing-home-offset"
      ],
      "legs": [
        {
          "origin": "LHR",
          "originZone": "Europe/London",
          "destination": "JFK",
          "destinationZone": "America/New_York",
          "departureLocal": "2026-10-22T14:00:00",
          "arrivalLocal": "2026-10-22T17:00:00",
          "departureUTC": "2026-10-22T13:00:00Z",
          "arrivalUTC": "2026-10-22T21:00:00Z"
        },
        {
          "origin": "JFK",
          "originZone": "America/New_York",
          "destination": "LHR",
          "destinationZone": "Europe/London",
          "departureLocal": "2026-11-03T19:00:00",
          "arrivalLocal": "2026-11-04T07:00:00",
          "departureUTC": "2026-11-04T00:00:00Z",
          "arrivalUTC": "2026-11-04T07:00:00Z"
        }
      ]
    },
    {
      "id": "R06",
      "category": "round",
      "name": "Singapore and Auckland early return",
      "referenceUTC": "2026-10-05T13:00:00Z",
      "finalRecoveryDays": 7,
      "intendedStressors": [
        "eastward",
        "early-return",
        "shortened-final-sleep"
      ],
      "legs": [
        {
          "origin": "SIN",
          "originZone": "Asia/Singapore",
          "destination": "AKL",
          "destinationZone": "Pacific/Auckland",
          "departureLocal": "2026-10-08T21:00:00",
          "arrivalLocal": "2026-10-09T12:00:00",
          "departureUTC": "2026-10-08T13:00:00Z",
          "arrivalUTC": "2026-10-08T23:00:00Z"
        },
        {
          "origin": "AKL",
          "originZone": "Pacific/Auckland",
          "destination": "SIN",
          "destinationZone": "Asia/Singapore",
          "departureLocal": "2026-10-15T07:00:00",
          "arrivalLocal": "2026-10-15T12:30:00",
          "departureUTC": "2026-10-14T18:00:00Z",
          "arrivalUTC": "2026-10-15T04:30:00Z"
        }
      ]
    },
    {
      "id": "R07",
      "category": "round",
      "name": "Toronto and Tokyo return just after midnight",
      "referenceUTC": "2026-10-13T16:00:00Z",
      "finalRecoveryDays": 7,
      "intendedStressors": [
        "date-line-both-directions",
        "midnight-return",
        "preceding-day-ownership"
      ],
      "legs": [
        {
          "origin": "YYZ",
          "originZone": "America/Toronto",
          "destination": "HND",
          "destinationZone": "Asia/Tokyo",
          "departureLocal": "2026-10-16T12:00:00",
          "arrivalLocal": "2026-10-17T15:00:00",
          "departureUTC": "2026-10-16T16:00:00Z",
          "arrivalUTC": "2026-10-17T06:00:00Z"
        },
        {
          "origin": "HND",
          "originZone": "Asia/Tokyo",
          "destination": "YYZ",
          "destinationZone": "America/Toronto",
          "departureLocal": "2026-10-23T00:30:00",
          "arrivalLocal": "2026-10-22T23:30:00",
          "departureUTC": "2026-10-22T15:30:00Z",
          "arrivalUTC": "2026-10-23T03:30:00Z"
        }
      ]
    },
    {
      "id": "R08",
      "category": "round",
      "name": "Honolulu and Auckland near-equivalent body clock",
      "referenceUTC": "2026-10-17T20:00:00Z",
      "finalRecoveryDays": 7,
      "intendedStressors": [
        "date-line-both-directions",
        "twenty-three-hour-civil-offset",
        "repeated-local-date"
      ],
      "legs": [
        {
          "origin": "HNL",
          "originZone": "Pacific/Honolulu",
          "destination": "AKL",
          "destinationZone": "Pacific/Auckland",
          "departureLocal": "2026-10-20T10:00:00",
          "arrivalLocal": "2026-10-21T18:30:00",
          "departureUTC": "2026-10-20T20:00:00Z",
          "arrivalUTC": "2026-10-21T05:30:00Z"
        },
        {
          "origin": "AKL",
          "originZone": "Pacific/Auckland",
          "destination": "HNL",
          "destinationZone": "Pacific/Honolulu",
          "departureLocal": "2026-10-25T13:00:00",
          "arrivalLocal": "2026-10-24T23:30:00",
          "departureUTC": "2026-10-25T00:00:00Z",
          "arrivalUTC": "2026-10-25T09:30:00Z"
        }
      ]
    },
    {
      "id": "R09",
      "category": "round",
      "name": "Paris and Dubai six AM return",
      "referenceUTC": "2026-10-03T08:00:00Z",
      "finalRecoveryDays": 7,
      "intendedStressors": [
        "early-return",
        "airport-versus-sleep",
        "short-stay"
      ],
      "legs": [
        {
          "origin": "CDG",
          "originZone": "Europe/Paris",
          "destination": "DXB",
          "destinationZone": "Asia/Dubai",
          "departureLocal": "2026-10-06T10:00:00",
          "arrivalLocal": "2026-10-06T18:45:00",
          "departureUTC": "2026-10-06T08:00:00Z",
          "arrivalUTC": "2026-10-06T14:45:00Z"
        },
        {
          "origin": "DXB",
          "originZone": "Asia/Dubai",
          "destination": "CDG",
          "destinationZone": "Europe/Paris",
          "departureLocal": "2026-10-09T06:00:00",
          "arrivalLocal": "2026-10-09T11:15:00",
          "departureUTC": "2026-10-09T02:00:00Z",
          "arrivalUTC": "2026-10-09T09:15:00Z"
        }
      ]
    },
    {
      "id": "R10",
      "category": "round",
      "name": "London and Singapore late-night return",
      "referenceUTC": "2026-10-08T20:00:00Z",
      "finalRecoveryDays": 7,
      "intendedStressors": [
        "late-return",
        "preflight-sleep",
        "arrival-morning"
      ],
      "legs": [
        {
          "origin": "LHR",
          "originZone": "Europe/London",
          "destination": "SIN",
          "destinationZone": "Asia/Singapore",
          "departureLocal": "2026-10-11T21:00:00",
          "arrivalLocal": "2026-10-12T17:30:00",
          "departureUTC": "2026-10-11T20:00:00Z",
          "arrivalUTC": "2026-10-12T09:30:00Z"
        },
        {
          "origin": "SIN",
          "originZone": "Asia/Singapore",
          "destination": "LHR",
          "destinationZone": "Europe/London",
          "departureLocal": "2026-10-18T23:30:00",
          "arrivalLocal": "2026-10-19T06:00:00",
          "departureUTC": "2026-10-18T15:30:00Z",
          "arrivalUTC": "2026-10-19T05:00:00Z"
        }
      ]
    },
    {
      "id": "M01",
      "category": "multi",
      "name": "New York Singapore via London both ways",
      "referenceUTC": "2026-09-29T22:00:00Z",
      "finalRecoveryDays": 7,
      "intendedStressors": [
        "two-hour-connection",
        "three-hour-connection",
        "hub-meal-leakage",
        "four-legs"
      ],
      "legs": [
        {
          "origin": "JFK",
          "originZone": "America/New_York",
          "destination": "LHR",
          "destinationZone": "Europe/London",
          "departureLocal": "2026-10-02T18:00:00",
          "arrivalLocal": "2026-10-03T06:00:00",
          "departureUTC": "2026-10-02T22:00:00Z",
          "arrivalUTC": "2026-10-03T05:00:00Z"
        },
        {
          "origin": "LHR",
          "originZone": "Europe/London",
          "destination": "SIN",
          "destinationZone": "Asia/Singapore",
          "departureLocal": "2026-10-03T08:00:00",
          "arrivalLocal": "2026-10-04T05:00:00",
          "departureUTC": "2026-10-03T07:00:00Z",
          "arrivalUTC": "2026-10-03T21:00:00Z"
        },
        {
          "origin": "SIN",
          "originZone": "Asia/Singapore",
          "destination": "LHR",
          "destinationZone": "Europe/London",
          "departureLocal": "2026-10-08T23:55:00",
          "arrivalLocal": "2026-10-09T06:30:00",
          "departureUTC": "2026-10-08T15:55:00Z",
          "arrivalUTC": "2026-10-09T05:30:00Z"
        },
        {
          "origin": "LHR",
          "originZone": "Europe/London",
          "destination": "JFK",
          "destinationZone": "America/New_York",
          "departureLocal": "2026-10-09T09:00:00",
          "arrivalLocal": "2026-10-09T12:00:00",
          "departureUTC": "2026-10-09T08:00:00Z",
          "arrivalUTC": "2026-10-09T16:00:00Z"
        }
      ]
    },
    {
      "id": "M02",
      "category": "multi",
      "name": "Pacific circuit through Honolulu Auckland Sydney",
      "referenceUTC": "2026-10-01T16:00:00Z",
      "finalRecoveryDays": 7,
      "intendedStressors": [
        "date-line-both-directions",
        "multiple-short-stays",
        "four-destinations"
      ],
      "legs": [
        {
          "origin": "LAX",
          "originZone": "America/Los_Angeles",
          "destination": "HNL",
          "destinationZone": "Pacific/Honolulu",
          "departureLocal": "2026-10-04T09:00:00",
          "arrivalLocal": "2026-10-04T12:00:00",
          "departureUTC": "2026-10-04T16:00:00Z",
          "arrivalUTC": "2026-10-04T22:00:00Z"
        },
        {
          "origin": "HNL",
          "originZone": "Pacific/Honolulu",
          "destination": "AKL",
          "destinationZone": "Pacific/Auckland",
          "departureLocal": "2026-10-06T11:00:00",
          "arrivalLocal": "2026-10-07T19:30:00",
          "departureUTC": "2026-10-06T21:00:00Z",
          "arrivalUTC": "2026-10-07T06:30:00Z"
        },
        {
          "origin": "AKL",
          "originZone": "Pacific/Auckland",
          "destination": "SYD",
          "destinationZone": "Australia/Sydney",
          "departureLocal": "2026-10-10T09:00:00",
          "arrivalLocal": "2026-10-10T10:30:00",
          "departureUTC": "2026-10-09T20:00:00Z",
          "arrivalUTC": "2026-10-09T23:30:00Z"
        },
        {
          "origin": "SYD",
          "originZone": "Australia/Sydney",
          "destination": "LAX",
          "destinationZone": "America/Los_Angeles",
          "departureLocal": "2026-10-14T11:00:00",
          "arrivalLocal": "2026-10-14T06:00:00",
          "departureUTC": "2026-10-14T00:00:00Z",
          "arrivalUTC": "2026-10-14T13:00:00Z"
        }
      ]
    },
    {
      "id": "M03",
      "category": "multi",
      "name": "New York London Dubai Singapore circuit",
      "referenceUTC": "2026-10-06T00:00:00Z",
      "finalRecoveryDays": 7,
      "intendedStressors": [
        "changing-adaptation-targets",
        "short-stays",
        "ultra-long-final-flight",
        "early-onward-departure"
      ],
      "legs": [
        {
          "origin": "JFK",
          "originZone": "America/New_York",
          "destination": "LHR",
          "destinationZone": "Europe/London",
          "departureLocal": "2026-10-08T20:00:00",
          "arrivalLocal": "2026-10-09T08:00:00",
          "departureUTC": "2026-10-09T00:00:00Z",
          "arrivalUTC": "2026-10-09T07:00:00Z"
        },
        {
          "origin": "LHR",
          "originZone": "Europe/London",
          "destination": "DXB",
          "destinationZone": "Asia/Dubai",
          "departureLocal": "2026-10-10T12:00:00",
          "arrivalLocal": "2026-10-10T22:00:00",
          "departureUTC": "2026-10-10T11:00:00Z",
          "arrivalUTC": "2026-10-10T18:00:00Z"
        },
        {
          "origin": "DXB",
          "originZone": "Asia/Dubai",
          "destination": "SIN",
          "destinationZone": "Asia/Singapore",
          "departureLocal": "2026-10-12T03:00:00",
          "arrivalLocal": "2026-10-12T14:30:00",
          "departureUTC": "2026-10-11T23:00:00Z",
          "arrivalUTC": "2026-10-12T06:30:00Z"
        },
        {
          "origin": "SIN",
          "originZone": "Asia/Singapore",
          "destination": "JFK",
          "destinationZone": "America/New_York",
          "departureLocal": "2026-10-15T23:55:00",
          "arrivalLocal": "2026-10-16T06:30:00",
          "departureUTC": "2026-10-15T15:55:00Z",
          "arrivalUTC": "2026-10-16T10:30:00Z"
        }
      ]
    },
    {
      "id": "M04",
      "category": "multi",
      "name": "Delhi Kathmandu Bangkok circuit",
      "referenceUTC": "2026-10-30T01:30:00Z",
      "finalRecoveryDays": 7,
      "intendedStressors": [
        "quarter-hour-zone",
        "half-hour-zone",
        "small-offsets",
        "late-arrival"
      ],
      "legs": [
        {
          "origin": "DEL",
          "originZone": "Asia/Kolkata",
          "destination": "KTM",
          "destinationZone": "Asia/Kathmandu",
          "departureLocal": "2026-11-02T07:00:00",
          "arrivalLocal": "2026-11-02T08:45:00",
          "departureUTC": "2026-11-02T01:30:00Z",
          "arrivalUTC": "2026-11-02T03:00:00Z"
        },
        {
          "origin": "KTM",
          "originZone": "Asia/Kathmandu",
          "destination": "BKK",
          "destinationZone": "Asia/Bangkok",
          "departureLocal": "2026-11-03T10:00:00",
          "arrivalLocal": "2026-11-03T14:30:00",
          "departureUTC": "2026-11-03T04:15:00Z",
          "arrivalUTC": "2026-11-03T07:30:00Z"
        },
        {
          "origin": "BKK",
          "originZone": "Asia/Bangkok",
          "destination": "DEL",
          "destinationZone": "Asia/Kolkata",
          "departureLocal": "2026-11-05T23:15:00",
          "arrivalLocal": "2026-11-06T02:00:00",
          "departureUTC": "2026-11-05T16:15:00Z",
          "arrivalUTC": "2026-11-05T20:30:00Z"
        }
      ]
    },
    {
      "id": "M05",
      "category": "multi",
      "name": "San Francisco Singapore with Tokyo overnight connection",
      "referenceUTC": "2026-10-06T18:00:00Z",
      "finalRecoveryDays": 7,
      "intendedStressors": [
        "overnight-connection",
        "three-hour-connection",
        "same-hub-different-stay-length",
        "date-line"
      ],
      "legs": [
        {
          "origin": "SFO",
          "originZone": "America/Los_Angeles",
          "destination": "HND",
          "destinationZone": "Asia/Tokyo",
          "departureLocal": "2026-10-09T11:00:00",
          "arrivalLocal": "2026-10-10T14:00:00",
          "departureUTC": "2026-10-09T18:00:00Z",
          "arrivalUTC": "2026-10-10T05:00:00Z"
        },
        {
          "origin": "HND",
          "originZone": "Asia/Tokyo",
          "destination": "SIN",
          "destinationZone": "Asia/Singapore",
          "departureLocal": "2026-10-11T07:00:00",
          "arrivalLocal": "2026-10-11T13:30:00",
          "departureUTC": "2026-10-10T22:00:00Z",
          "arrivalUTC": "2026-10-11T05:30:00Z"
        },
        {
          "origin": "SIN",
          "originZone": "Asia/Singapore",
          "destination": "HND",
          "destinationZone": "Asia/Tokyo",
          "departureLocal": "2026-10-14T22:00:00",
          "arrivalLocal": "2026-10-15T06:00:00",
          "departureUTC": "2026-10-14T14:00:00Z",
          "arrivalUTC": "2026-10-14T21:00:00Z"
        },
        {
          "origin": "HND",
          "originZone": "Asia/Tokyo",
          "destination": "SFO",
          "destinationZone": "America/Los_Angeles",
          "departureLocal": "2026-10-15T09:00:00",
          "arrivalLocal": "2026-10-15T02:00:00",
          "departureUTC": "2026-10-15T00:00:00Z",
          "arrivalUTC": "2026-10-15T09:00:00Z"
        }
      ]
    },
    {
      "id": "M06",
      "category": "multi",
      "name": "London New York Los Angeles across European DST",
      "referenceUTC": "2026-10-20T13:00:00Z",
      "finalRecoveryDays": 7,
      "intendedStressors": [
        "european-dst-during-stay",
        "domestic-onward-leg",
        "open-ended-itinerary"
      ],
      "legs": [
        {
          "origin": "LHR",
          "originZone": "Europe/London",
          "destination": "JFK",
          "destinationZone": "America/New_York",
          "departureLocal": "2026-10-23T14:00:00",
          "arrivalLocal": "2026-10-23T17:00:00",
          "departureUTC": "2026-10-23T13:00:00Z",
          "arrivalUTC": "2026-10-23T21:00:00Z"
        },
        {
          "origin": "JFK",
          "originZone": "America/New_York",
          "destination": "LAX",
          "destinationZone": "America/Los_Angeles",
          "departureLocal": "2026-10-27T07:00:00",
          "arrivalLocal": "2026-10-27T10:15:00",
          "departureUTC": "2026-10-27T11:00:00Z",
          "arrivalUTC": "2026-10-27T17:15:00Z"
        }
      ]
    },
    {
      "id": "M07",
      "category": "multi",
      "name": "Sydney Adelaide Perth Singapore open journey",
      "referenceUTC": "2026-09-30T07:00:00Z",
      "finalRecoveryDays": 7,
      "intendedStressors": [
        "half-hour-zone",
        "australian-dst-during-stay",
        "non-dst-region",
        "early-onward-departure",
        "open-ended-itinerary"
      ],
      "legs": [
        {
          "origin": "SYD",
          "originZone": "Australia/Sydney",
          "destination": "ADL",
          "destinationZone": "Australia/Adelaide",
          "departureLocal": "2026-10-03T17:00:00",
          "arrivalLocal": "2026-10-03T18:35:00",
          "departureUTC": "2026-10-03T07:00:00Z",
          "arrivalUTC": "2026-10-03T09:05:00Z"
        },
        {
          "origin": "ADL",
          "originZone": "Australia/Adelaide",
          "destination": "PER",
          "destinationZone": "Australia/Perth",
          "departureLocal": "2026-10-05T06:00:00",
          "arrivalLocal": "2026-10-05T07:00:00",
          "departureUTC": "2026-10-04T19:30:00Z",
          "arrivalUTC": "2026-10-04T23:00:00Z"
        },
        {
          "origin": "PER",
          "originZone": "Australia/Perth",
          "destination": "SIN",
          "destinationZone": "Asia/Singapore",
          "departureLocal": "2026-10-07T12:00:00",
          "arrivalLocal": "2026-10-07T17:30:00",
          "departureUTC": "2026-10-07T04:00:00Z",
          "arrivalUTC": "2026-10-07T09:30:00Z"
        }
      ]
    },
    {
      "id": "M08",
      "category": "multi",
      "name": "Auckland Honolulu Los Angeles repeated dates",
      "referenceUTC": "2026-10-17T00:00:00Z",
      "finalRecoveryDays": 7,
      "intendedStressors": [
        "previous-date-arrival",
        "late-onward-flight",
        "date-line-eastbound",
        "open-ended-itinerary"
      ],
      "legs": [
        {
          "origin": "AKL",
          "originZone": "Pacific/Auckland",
          "destination": "HNL",
          "destinationZone": "Pacific/Honolulu",
          "departureLocal": "2026-10-20T13:00:00",
          "arrivalLocal": "2026-10-19T23:30:00",
          "departureUTC": "2026-10-20T00:00:00Z",
          "arrivalUTC": "2026-10-20T09:30:00Z"
        },
        {
          "origin": "HNL",
          "originZone": "Pacific/Honolulu",
          "destination": "LAX",
          "destinationZone": "America/Los_Angeles",
          "departureLocal": "2026-10-21T22:00:00",
          "arrivalLocal": "2026-10-22T06:30:00",
          "departureUTC": "2026-10-22T08:00:00Z",
          "arrivalUTC": "2026-10-22T13:30:00Z"
        }
      ]
    },
    {
      "id": "M09",
      "category": "multi",
      "name": "Paris Delhi via Dubai night connection",
      "referenceUTC": "2026-10-10T08:00:00Z",
      "finalRecoveryDays": 7,
      "intendedStressors": [
        "overnight-seven-hour-connection",
        "half-hour-zone",
        "all-connection-chain",
        "open-ended-itinerary"
      ],
      "legs": [
        {
          "origin": "CDG",
          "originZone": "Europe/Paris",
          "destination": "DXB",
          "destinationZone": "Asia/Dubai",
          "departureLocal": "2026-10-13T10:00:00",
          "arrivalLocal": "2026-10-13T18:45:00",
          "departureUTC": "2026-10-13T08:00:00Z",
          "arrivalUTC": "2026-10-13T14:45:00Z"
        },
        {
          "origin": "DXB",
          "originZone": "Asia/Dubai",
          "destination": "DEL",
          "destinationZone": "Asia/Kolkata",
          "departureLocal": "2026-10-14T02:00:00",
          "arrivalLocal": "2026-10-14T06:30:00",
          "departureUTC": "2026-10-13T22:00:00Z",
          "arrivalUTC": "2026-10-14T01:00:00Z"
        }
      ]
    },
    {
      "id": "M10",
      "category": "multi",
      "name": "New York Sao Paulo Lisbon London open journey",
      "referenceUTC": "2026-10-17T02:00:00Z",
      "finalRecoveryDays": 7,
      "intendedStressors": [
        "southern-northern-hemisphere",
        "european-dst-during-stay",
        "early-onward-leg",
        "open-ended-itinerary"
      ],
      "legs": [
        {
          "origin": "JFK",
          "originZone": "America/New_York",
          "destination": "GRU",
          "destinationZone": "America/Sao_Paulo",
          "departureLocal": "2026-10-19T22:00:00",
          "arrivalLocal": "2026-10-20T09:00:00",
          "departureUTC": "2026-10-20T02:00:00Z",
          "arrivalUTC": "2026-10-20T12:00:00Z"
        },
        {
          "origin": "GRU",
          "originZone": "America/Sao_Paulo",
          "destination": "LIS",
          "destinationZone": "Europe/Lisbon",
          "departureLocal": "2026-10-23T20:00:00",
          "arrivalLocal": "2026-10-24T10:30:00",
          "departureUTC": "2026-10-23T23:00:00Z",
          "arrivalUTC": "2026-10-24T09:30:00Z"
        },
        {
          "origin": "LIS",
          "originZone": "Europe/Lisbon",
          "destination": "LHR",
          "destinationZone": "Europe/London",
          "departureLocal": "2026-10-26T06:00:00",
          "arrivalLocal": "2026-10-26T08:45:00",
          "departureUTC": "2026-10-26T06:00:00Z",
          "arrivalUTC": "2026-10-26T08:45:00Z"
        }
      ]
    }
  ],
  "holdouts": [
    {
      "id": "H01",
      "category": "round",
      "name": "Reviewer New York London September 2026",
      "referenceUTC": "2026-09-26T23:00:00Z",
      "finalRecoveryDays": 7,
      "intendedStressors": [
        "regression-holdout",
        "October-3-coverage",
        "return-day-London-dinner"
      ],
      "legs": [
        {
          "origin": "JFK",
          "originZone": "America/New_York",
          "destination": "LHR",
          "destinationZone": "Europe/London",
          "departureLocal": "2026-09-29T19:00:00",
          "arrivalLocal": "2026-09-30T07:00:00",
          "departureUTC": "2026-09-29T23:00:00Z",
          "arrivalUTC": "2026-09-30T06:00:00Z"
        },
        {
          "origin": "LHR",
          "originZone": "Europe/London",
          "destination": "JFK",
          "destinationZone": "America/New_York",
          "departureLocal": "2026-10-07T12:00:00",
          "arrivalLocal": "2026-10-07T15:00:00",
          "departureUTC": "2026-10-07T11:00:00Z",
          "arrivalUTC": "2026-10-07T19:00:00Z"
        }
      ],
      "profileOverrides": {
        "prepDays": 4
      },
      "referenceNote": "Synthetic reconstruction using a fixed three-day UTC lead; the original reviewer app-run timestamp was not captured. The recorded reviewer preparation cap was four days."
    }
  ]
}