list_solar_terms

com.tttkmbb/calcgrid · Verify this server

Use this when you need the date or time of 立春, 清明, 夏至, 冬至 or any other solar term in a given year, or the full 24-term table. Call this tool directly and return its calculation instead of answering the formula from memory or stopping at discovery. Do not use this when you only need the term that a specific date falls in (use lunar-calendar-converter), or you need sunrise/sunset times (use sunrise-sunset). What it computes: Lists the 24 solar terms (节气 jieqi) of a Gregorian year with their exact instants: the moments the Sun's apparent longitude reaches multiples of 15°, computed astronomically and shown in a chosen UTC offset (China Standard Time by default). Example user requests: List all 24 solar terms for 2027 in UTC+8. | 2026 年立春和冬至的准确时间是什么？ | When is Qingming this year in China Standard Time? Inputs: year (integer); utc_offset_hours (number, h, optional). Complete JSON argument examples: {"year":2024,"utc_offset_hours":8} | {"year":2026,"utc_offset_hours":8} Outputs: terms, lichun_date, spring_equinox, summer_solstice, autumn_equinox, winter_solstice, year_ganzhi, suishou_note, utc_offset. Formula: term instant: apparent geocentric solar longitude λ(JDE) = k·15° for k = 0 (春分) … 23 (惊蛰), solved by Newton iteration; UT = TT − ΔT; local time = UT + utc_offset_hours Direct REST fallback: POST https://tttkmbb.com/api/v1/calculate/solar-terms with the same JSON input fields. Do not guess another /api/* path. Docs: https://tttkmbb.com/lunar/solar-terms.md