Four Pillars (BaZi) chart for a date and optional time: stems, branches, animals...

{ "method": "GET", "queryParams": { "date": "1990-05-17", "time": "14:30", "utcOffset": 8 }, "type": "http" }

{ "example": { "asOf": "2026-10-21T00:32:43.318Z", "baziYear": 1990, "dayMaster": { "element": "Water", "polarity": "yang", "stem": "壬" }, "dayStartsAt": "midnight", "degraded": false, "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.", "elementCounts": { "Earth": 1, "Fire": 4, "Metal": 2, "Water": 1, "Wood": 0 }, "hourPillarIncluded": true, "missingElements": [ "Wood" ], "notChecked": [ "true solar time or longitude correction (the clock time you give is used as is)", "historical daylight-saving clocks (give the offset actually in force)", "…2 more" ], "pillars": { "day": { "branchAnimal": "Horse", "branchElement": "Fire", "pinyin": "Ren-Wu", "stemElement": "Water", "stemPolarity": "yang", "text": "壬午" }, "hour": { "branchAnimal": "Goat", "branchElement": "Earth", "pinyin": "Ding-Wei", "stemElement": "Fire", "stemPolarity": "yin", "text": "丁未" }, "month": { "branchAnimal": "Snake", "branchElement": "Fire", "pinyin": "Xin-Si", "stemElement": "Metal", "stemPolarity": "yin", "text": "辛巳" }, "year": { "branchAnimal": "Horse", "branchElement": "Fire", "pinyin": "Geng-Wu", "stemElement": "Metal", "stemPolarity": "yang", "text": "庚午" } }, "reasons": [ "BaZi year 1990 (the year changes at Lichun, not on 1 January or lunar New Year).", "The month pillar changes at the 12 jie solar terms; the day pillar counts days in a 60-day cycle." ], "source": "Sexagenary cycle arithmetic with exact Lichun and jie-term instants (Meeus ch. 25), computed locally", "strongestElements": [ "Fire" ], "summary": "1990-05-17 14:30: 庚午 辛巳 壬午 丁未 (year, month, day, hour); day master 壬 Water.", "sunLongitudeDeg": 56.108, "utcOffset": 8, "verdict": "CHART_COMPUTED" }, "type": "json" }