{"success":true,"version":"v1","request":{"tool":"calculate_nine_star_periods","calculator_id":"nine-star-feng-shui","inputs":{"date":"2026-09-24"},"request_id":"req_34b3c114d4be4f35a098","received_at":"2026-09-24T08:35:07Z"},"result":{"entity_type":"calculation","id":"calc_nine-star-feng-shui","calculator_id":"nine-star-feng-shui","calculator_name":"Nine Star Periods (紫白飞星)","category":"lunar","status":"completed","values":{"year_used":2026,"year_star":1,"year_star_name":"1 一白 (Yibai) — Water, 坎 Kan","month_star":1,"month_star_name":"1 一白 (Yibai) — Water, 坎 Kan","day_star":8,"day_star_name":"8 八白 (Babai) — Earth, 艮 Gen","day_star_cycle":"阴遁 (yin, descending) from the 甲子 day 2026-08-18 (day 38 of the sequence)","period_number":9,"period_name":"下元九运 (Xiayuan, lower yuan, period 9)","period_years":"2024–2043","period_trigram_element":"离 Li — Fire (九紫 Jiuzi)","notes":["Month star sequence for a 午 year starts at 8 in the 寅 month; the date is in the 酉 month.","Traditional reference calculation of the Chinese calendar tradition; not a prediction and not medical, legal or financial advice."]},"units":{},"formula":"year_star = 1 − ((year − 1864) mod 9) wrapped into 1–9; month_star = start − months since 寅, start = 8 for 子午卯酉 years, 5 for 辰戌丑未, 2 for 寅申巳亥; day_star = 1 + n (阳遁) or 9 − n (阴遁) wrapped into 1–9, n = days since the first 甲子 day on or after the winter (阳) or summer (阴) solstice; period = floor((year − 1864) / 20) + 1","notes":[],"summary":"Year used: 2026; Year star (年紫白): 1; Year star name: 1 一白 (Yibai) — Water, 坎 Kan; Month star (月紫白): 1; Month star name: 1 一白 (Yibai) — Water, 坎 Kan; Day star (日紫白): 8; Day star name: 8 八白 (Babai) — Earth, 艮 Gen; Day star cycle: 阴遁 (yin, descending) from the 甲子 day 2026-08-18 (day 38 of the sequence); Period (运): 9; Period name: 下元九运 (Xiayuan, lower yuan, period 9); Period years: 2024–2043; Period trigram and element: 离 Li — Fire (九紫 Jiuzi); Notes: Month star sequence for a 午 year starts at 8 in the 寅 month; the date is in the 酉 month., Traditional reference calculation of the Chinese calendar tradition; not a prediction and not medical, legal or financial advice."},"warnings":[],"sources":[{"name":"Flying Star Feng Shui – nine stars and 20-year periods (Wikipedia)","url":"https://en.wikipedia.org/wiki/Flying_Star_Feng_Shui","type":"reference","retrieved_at":"2026-09-24"},{"name":"Lo Shu Square (Wikipedia)","url":"https://en.wikipedia.org/wiki/Lo_Shu_Square","type":"reference","retrieved_at":"2026-09-24"},{"name":"Solar term (Wikipedia)","url":"https://en.wikipedia.org/wiki/Solar_term","type":"reference","retrieved_at":"2026-09-24"}],"freshness":{"type":"daily","max_age_seconds":86400,"note":"Depends on the current date."},"cache":{"hit":false,"cacheable":true,"deterministic":false,"max_age_seconds":86400,"note":"Depends on the current date (inputs left at their default 'today'); re-run when the date changes. Explicit inputs make it deterministic."},"timestamp":"2026-09-24T08:35:07Z","duration_ms":0,"next_actions":[{"tool":"describe_chinese_almanac_day","calculator_id":"chinese-almanac","reason":"Other day attributes of the same date.","url":"https://tttkmbb.com/api/v1/calculate/chinese-almanac","docs":"https://tttkmbb.com/lunar/chinese-almanac.md"},{"tool":"list_solar_terms","calculator_id":"solar-terms","reason":"立春 and the 节 that start each month star.","url":"https://tttkmbb.com/api/v1/calculate/solar-terms","docs":"https://tttkmbb.com/lunar/solar-terms.md"},{"tool":"find_chinese_zodiac","calculator_id":"chinese-zodiac","reason":"Zodiac and stem-branch of the year.","url":"https://tttkmbb.com/api/v1/calculate/chinese-zodiac","docs":"https://tttkmbb.com/lunar/chinese-zodiac.md"}],"links":{"self":"https://tttkmbb.com/api/v1/calculate/nine-star-feng-shui?date=2026-09-24","html":"https://tttkmbb.com/lunar/nine-star-feng-shui?date=2026-09-24","markdown":"https://tttkmbb.com/lunar/nine-star-feng-shui.md","schema":"https://tttkmbb.com/api/v1/calculators/nine-star-feng-shui","openapi":"https://tttkmbb.com/openapi.json","mcp":"https://tttkmbb.com/mcp","task":"https://tttkmbb.com/api/v1/tasks/task_eyJjIjoibmluZS1zdGFyLWZlbmctc2h1aSIsImkiOnsiZGF0ZSI6IjIwMjYtMDktMjQifSwidCI6IjIwMjYtMDktMjRUMDg6MzU6MDdaIn0"}}