{
  "schemaVersion": "equinox-source-metadata/1.0.0",
  "datasetVersion": "equinox-passage/1.0.0",
  "astronomyVersion": "astronomy/1.0.0",
  "calendarVersion": "pattern-calendar/1.0.0",
  "dataOrigin": "third-party-copied-and-validated",
  "sourceIntegrityStatus": "partial-unverified-third-party-source-chain",
  "canonicalDataset": {
    "timeZone": "America/Los_Angeles",
    "boundaryMode": "sunset",
    "manualSunset": "18:00"
  },
  "timestampResolutionSeconds": 1,
  "validationToleranceSeconds": 3,
  "maximumMeasuredDeviationSeconds": 2.057,
  "maximumDeviationYear": 2022,
  "generationTimestamp": "2026-07-22T00:00:00Z",
  "primarySource": {
    "label": "janmr.com equinoxes and solstices table",
    "websiteUrl": "https://janmr.com/",
    "primarySourceUrl": "unknown",
    "sourceTableUrl": "unknown",
    "retrievalDate": "2026-07-22",
    "sourceRevisionOrChecksum": "6262e4eb07b8de0d45f2256eef9f5b94bf3f8fdc",
    "copiedIntoRepository": true,
    "generatedInsideRepository": false,
    "skyfieldVersion": "unknown",
    "jplKernelFilename": "unknown",
    "ephemerisVersionOrChecksum": "unknown",
    "timescale": "UTC",
    "equinoxFindingAlgorithm": "unknown; repository imports third-party whole-second March equinox timestamps rather than reproducing the original computation",
    "generationScriptPath": "scripts/generate-equinox-passage-data.mjs",
    "timestampRoundingPolicy": "Imported whole-second UTC timestamps are stored exactly as copied; the repository does not invent sub-second values"
  },
  "independentValidation": {
    "label": "bazica solar-term validation table",
    "independentValidationUrl": "unknown",
    "sourceRevisionOrChecksum": "79b48bf2",
    "validationMethod": "Compare each stored whole-second UTC equinox instant against the independent validation instant and record the absolute difference in seconds",
    "observedDifferencesSource": "Per-year UTC comparisons bundled in this repository"
  },
  "lunarMethod": {
    "label": "Approximate synodic lunar phase",
    "authoritative": true,
    "source": "approximate-synodic-phase",
    "sourceVersion": "13-moons-synodic/1.0.0",
    "knownNewMoonUtc": "2000-01-06T18:14:00Z",
    "synodicMonthDays": 29.530588853,
    "calculationInstantPolicy": "Compute phase name and illumination at the exact equinox UTC instant",
    "approximate": true
  },
  "records": [
    { "year": 2014, "utcInstant": "2014-03-20T16:57:05Z", "validationUtcInstant": "2014-03-20T16:57:06.760Z", "validationDeltaSeconds": 1.76 },
    { "year": 2015, "utcInstant": "2015-03-20T22:45:09Z", "validationUtcInstant": "2015-03-20T22:45:10.500Z", "validationDeltaSeconds": 1.5 },
    { "year": 2016, "utcInstant": "2016-03-20T04:30:11Z", "validationUtcInstant": "2016-03-20T04:30:12.330Z", "validationDeltaSeconds": 1.33 },
    { "year": 2017, "utcInstant": "2017-03-20T10:28:37Z", "validationUtcInstant": "2017-03-20T10:28:39.049Z", "validationDeltaSeconds": 2.049 },
    { "year": 2018, "utcInstant": "2018-03-20T16:15:27Z", "validationUtcInstant": "2018-03-20T16:15:28.473Z", "validationDeltaSeconds": 1.473 },
    { "year": 2019, "utcInstant": "2019-03-20T21:58:25Z", "validationUtcInstant": "2019-03-20T21:58:26.961Z", "validationDeltaSeconds": 1.961 },
    { "year": 2020, "utcInstant": "2020-03-20T03:49:37Z", "validationUtcInstant": "2020-03-20T03:49:38.267Z", "validationDeltaSeconds": 1.267 },
    { "year": 2021, "utcInstant": "2021-03-20T09:37:28Z", "validationUtcInstant": "2021-03-20T09:37:29.688Z", "validationDeltaSeconds": 1.688 },
    { "year": 2022, "utcInstant": "2022-03-20T15:33:24Z", "validationUtcInstant": "2022-03-20T15:33:26.057Z", "validationDeltaSeconds": 2.057 },
    { "year": 2023, "utcInstant": "2023-03-20T21:24:26Z", "validationUtcInstant": "2023-03-20T21:24:27.653Z", "validationDeltaSeconds": 1.653 },
    { "year": 2024, "utcInstant": "2024-03-20T03:06:24Z", "validationUtcInstant": "2024-03-20T03:06:25.264Z", "validationDeltaSeconds": 1.264 },
    { "year": 2025, "utcInstant": "2025-03-20T09:01:28Z", "validationUtcInstant": "2025-03-20T09:01:30.009Z", "validationDeltaSeconds": 2.009 },
    { "year": 2026, "utcInstant": "2026-03-20T14:45:57Z", "validationUtcInstant": "2026-03-20T14:45:58.471Z", "validationDeltaSeconds": 1.471 }
  ]
}