convert_lunar_to_solar

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Use this when you know a lunar date such as 八月十五 or 闰六月初一 of a given lunar year and need the Gregorian date (e.g. for a lunar birthday or festival). 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 start from a Gregorian date (use lunar-calendar-converter), or you want every festival of a year at once (use chinese-festivals). What it computes: Converts a Chinese lunar calendar date (year, month, leap-month flag, day) to the Gregorian date, reporting the weekday, the day's ganzhi (干支) and the length of that lunar month, and validating that the leap month and day exist in that year. Example user requests: What Gregorian date is lunar 2026 month 8 day 15? | 2025 年农历闰六月初一对应公历哪一天？ | Convert a Chinese lunar birthday to its Gregorian date and verify the leap-month flag. Inputs: lunar_year (integer); lunar_month (integer); is_leap_month (boolean, optional); lunar_day (integer). Complete JSON argument examples: {"lunar_year":2026,"lunar_month":8,"is_leap_month":false,"lunar_day":15} | {"lunar_year":2025,"lunar_month":6,"is_leap_month":true,"lunar_day":1} Outputs: gregorian_date, weekday, day_ganzhi, month_days, lunar_date_chinese, month_name, year_ganzhi, zodiac, julian_day_number, leap_month_note. Formula: JDN = start of the lunar month (new-moon day at UTC+8) + lunar_day − 1; month numbering per GB/T 33661-2017 (month 11 contains the winter solstice; leap month = first month without a 中气) Direct REST fallback: POST https://tttkmbb.com/api/v1/calculate/lunar-to-solar with the same JSON input fields. Do not guess another /api/* path. Docs: https://tttkmbb.com/lunar/lunar-to-solar.md