{
  "conducted_by": "SYNCDATE",
  "analysis_date": "2026-10-30",
  "model": "Intersection in UTC of 09:00–17:00 local office hours, Monday–Friday",
  "start_date": "2026-10-19",
  "end_date": "2026-11-06",
  "weekdays": 15,
  "pairs": 12,
  "rows": 180,
  "unit": "modeled shared office hours per city pair per weekday",
  "exclusions": [
    "holidays",
    "lunch",
    "part-time schedules",
    "actual calendar events"
  ],
  "interpretation": "Public time-zone rule model; not observed availability, meetings, or productivity",
  "interval_rule": "max(0, min(end_A_utc, end_B_utc) - max(start_A_utc, start_B_utc)); touching endpoints = zero",
  "verification": {
    "pilot_csv_rows_matched": 180,
    "pilot_json_examples_matched": 12,
    "fixed_offset_rows_matched": 180,
    "pairs_gaining_one_hour": 11,
    "zero_overlap_pairs_before": 4,
    "zero_overlap_pairs_during_gap": 1,
    "all_pairs_return_to_baseline": true
  },
  "sources": [
    "https://www.gov.uk/when-do-the-clocks-change",
    "https://www.nist.gov/pml/time-and-frequency-division/popular-links/daylight-saving-time-dst",
    "https://www.boe.es/buscar/doc.php?id=DOUE-Z-2021-70039"
  ],
  "environment": {
    "python": "3.14.6",
    "zones": {
      "Europe/Lisbon": {
        "source": "system",
        "tzpath": "/usr/share/zoneinfo",
        "version": "2026e",
        "sha256": "92b07cb24689226bf934308d1f1bd33c306aa4da610c52cd5bce25077960502c"
      },
      "Europe/London": {
        "source": "system",
        "tzpath": "/usr/share/zoneinfo",
        "version": "2026e",
        "sha256": "c85495070dca42687df6a1c3ee780a27cbcb82f1844750ea6f642833a44d29b4"
      },
      "Europe/Berlin": {
        "source": "system",
        "tzpath": "/usr/share/zoneinfo",
        "version": "2026e",
        "sha256": "5ee475f71a0fc1a32faeb849f8c39c6e7aa66d6d41ec742b97b3a7436b3b0701"
      },
      "America/New_York": {
        "source": "system",
        "tzpath": "/usr/share/zoneinfo",
        "version": "2026e",
        "sha256": "e9ed07d7bee0c76a9d442d091ef1f01668fee7c4f26014c0a868b19fe6c18a95"
      },
      "America/Chicago": {
        "source": "system",
        "tzpath": "/usr/share/zoneinfo",
        "version": "2026e",
        "sha256": "feba326ebe88eac20017a718748c46c68469a1e7f5e7716dcb8f1d43a6e6f686"
      },
      "America/Denver": {
        "source": "system",
        "tzpath": "/usr/share/zoneinfo",
        "version": "2026e",
        "sha256": "32e819c00a43b3c348f539d700d425504f20b8d068c16418d26fa9b693e775c9"
      },
      "America/Los_Angeles": {
        "source": "system",
        "tzpath": "/usr/share/zoneinfo",
        "version": "2026e",
        "sha256": "68977bb9ad6d186fefc6c7abd36010a66e30008dcb2d376087a41c49861e7268"
      }
    }
  },
  "data_sha256": {
    "modeled-work-hours.csv": "d00c9773b155ba8af6b7f1ff67cbff12c0601395a3dd480b83414559765a7fc4",
    "results-summary.csv": "2348404cf3bd5e4efc57c913d83d384f584c5259d63e74c3acdd1be19da287d9"
  }
}