{ "checked_at": "2026-09-09T01:38:09.340539+00:00", "lunar_python": "1.4.8", "swiss_ephemeris": "2.10.03", "reference_method": "Independent offline Swiss Ephemeris Moshier apparent geocentric tropical solar-longitude crossing (UT1 treated as UTC within subsecond scale for modern dates). Not used by the production BaZi calculator.", "tolerance_seconds": 120, "all_within_tolerance": true, "max_difference_seconds": 4.727, "limitation": "60 selected term instants in five years; not validation of every date or of interpretive claims. Historical/future delta-T models can differ.", "rows": [ { "year": 1900, "term": "小寒", "solar_longitude_degrees": 285, "lunar_python_utc": "1900-01-05T18:03:57Z", "swiss_moshier_ut1_approximately_utc": "1900-01-05T18:03:56Z", "difference_seconds": 0.013 }, { "year": 1900, "term": "立春", "solar_longitude_degrees": 315, "lunar_python_utc": "1900-02-04T05:51:31Z", "swiss_moshier_ut1_approximately_utc": "1900-02-04T05:51:29Z", "difference_seconds": 1.357 }, { "year": 1900, "term": "惊蛰", "solar_longitude_degrees": 345, "lunar_python_utc": "1900-03-06T00:21:52Z", "swiss_moshier_ut1_approximately_utc": "1900-03-06T00:21:49Z", "difference_seconds": 2.181 }, { "year": 1900, "term": "清明", "solar_longitude_degrees": 15, "lunar_python_utc": "1900-04-05T05:52:41Z", "swiss_moshier_ut1_approximately_utc": "1900-04-05T05:52:38Z", "difference_seconds": 2.386 }, { "year": 1900, "term": "立夏", "solar_longitude_degrees": 45, "lunar_python_utc": "1900-05-05T23:55:12Z", "swiss_moshier_ut1_approximately_utc": "1900-05-05T23:55:10Z", "difference_seconds": 1.208 }, { "year": 1900, "term": "芒种", "solar_longitude_degrees": 75, "lunar_python_utc": "1900-06-06T04:38:55Z", "swiss_moshier_ut1_approximately_utc": "1900-06-06T04:38:54Z", "difference_seconds": 0.387 }, { "year": 1900, "term": "小暑", "solar_longitude_degrees": 105, "lunar_python_utc": "1900-07-07T15:10:08Z", "swiss_moshier_ut1_approximately_utc": "1900-07-07T15:10:08Z", "difference_seconds": -0.12 }, { "year": 1900, "term": "立秋", "solar_longitude_degrees": 135, "lunar_python_utc": "1900-08-08T00:50:34Z", "swiss_moshier_ut1_approximately_utc": "1900-08-08T00:50:33Z", "difference_seconds": 0.352 }, { "year": 1900, "term": "白露", "solar_longitude_degrees": 165, "lunar_python_utc": "1900-09-08T03:16:38Z", "swiss_moshier_ut1_approximately_utc": "1900-09-08T03:16:36Z", "difference_seconds": 1.839 }, { "year": 1900, "term": "寒露", "solar_longitude_degrees": 195, "lunar_python_utc": "1900-10-08T18:13:09Z", "swiss_moshier_ut1_approximately_utc": "1900-10-08T18:13:06Z", "difference_seconds": 2.346 }, { "year": 1900, "term": "立冬", "solar_longitude_degrees": 225, "lunar_python_utc": "1900-11-07T20:39:44Z", "swiss_moshier_ut1_approximately_utc": "1900-11-07T20:39:41Z", "difference_seconds": 2.138 }, { "year": 1900, "term": "大雪", "solar_longitude_degrees": 255, "lunar_python_utc": "1900-12-07T12:55:50Z", "swiss_moshier_ut1_approximately_utc": "1900-12-07T12:55:49Z", "difference_seconds": 0.514 }, { "year": 1950, "term": "小寒", "solar_longitude_degrees": 285, "lunar_python_utc": "1950-01-05T21:38:43Z", "swiss_moshier_ut1_approximately_utc": "1950-01-05T21:38:42Z", "difference_seconds": 0.5 }, { "year": 1950, "term": "立春", "solar_longitude_degrees": 315, "lunar_python_utc": "1950-02-04T09:20:46Z", "swiss_moshier_ut1_approximately_utc": "1950-02-04T09:20:45Z", "difference_seconds": 0.913 }, { "year": 1950, "term": "惊蛰", "solar_longitude_degrees": 345, "lunar_python_utc": "1950-03-06T03:35:26Z", "swiss_moshier_ut1_approximately_utc": "1950-03-06T03:35:25Z", "difference_seconds": 0.053 }, { "year": 1950, "term": "清明", "solar_longitude_degrees": 15, "lunar_python_utc": "1950-04-05T08:44:27Z", "swiss_moshier_ut1_approximately_utc": "1950-04-05T08:44:26Z", "difference_seconds": 0.335 }, { "year": 1950, "term": "立夏", "solar_longitude_degrees": 45, "lunar_python_utc": "1950-05-06T02:24:41Z", "swiss_moshier_ut1_approximately_utc": "1950-05-06T02:24:39Z", "difference_seconds": 1.629 }, { "year": 1950, "term": "芒种", "solar_longitude_degrees": 75, "lunar_python_utc": "1950-06-06T06:51:00Z", "swiss_moshier_ut1_approximately_utc": "1950-06-06T06:50:58Z", "difference_seconds": 1.518 }, { "year": 1950, "term": "小暑", "solar_longitude_degrees": 105, "lunar_python_utc": "1950-07-07T17:13:17Z", "swiss_moshier_ut1_approximately_utc": "1950-07-07T17:13:16Z", "difference_seconds": 0.236 }, { "year": 1950, "term": "立秋", "solar_longitude_degrees": 135, "lunar_python_utc": "1950-08-08T02:55:11Z", "swiss_moshier_ut1_approximately_utc": "1950-08-08T02:55:11Z", "difference_seconds": -0.732 }, { "year": 1950, "term": "白露", "solar_longitude_degrees": 165, "lunar_python_utc": "1950-09-08T05:33:39Z", "swiss_moshier_ut1_approximately_utc": "1950-09-08T05:33:40Z", "difference_seconds": -1.105 }, { "year": 1950, "term": "寒露", "solar_longitude_degrees": 195, "lunar_python_utc": "1950-10-08T20:51:39Z", "swiss_moshier_ut1_approximately_utc": "1950-10-08T20:51:38Z", "difference_seconds": 0.065 }, { "year": 1950, "term": "立冬", "solar_longitude_degrees": 225, "lunar_python_utc": "1950-11-07T23:43:43Z", "swiss_moshier_ut1_approximately_utc": "1950-11-07T23:43:42Z", "difference_seconds": 0.262 }, { "year": 1950, "term": "大雪", "solar_longitude_degrees": 255, "lunar_python_utc": "1950-12-07T16:21:40Z", "swiss_moshier_ut1_approximately_utc": "1950-12-07T16:21:39Z", "difference_seconds": 0.189 }, { "year": 1988, "term": "小寒", "solar_longitude_degrees": 285, "lunar_python_utc": "1988-01-06T03:03:30Z", 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255, "lunar_python_utc": "2050-12-06T22:41:54Z", "swiss_moshier_ut1_approximately_utc": "2050-12-06T22:41:51Z", "difference_seconds": 2.759 } ] }