Get JDE of a specific solar term (1-24)
Solar terms are numbered 1-24: 1=立春, 2=雨水, 3=惊蛰, 4=春分, ..., 23=小寒, 24=大寒. Odd numbers are minor terms (节气), even numbers are major terms (中气).
For terms 1-3 (立春, 雨水, 惊蛰), the Gregorian year is adjusted backward by 1 because these terms belong to the previous solar year.
Calendar configuration
Solar term number (1-24)
Gregorian year
JDE of the solar term, adjusted to local midnight
Low-level pure functions for calendar conversion. Most users should prefer the ChineseDate value object API. These functions are useful when you need fine-grained control or want to build custom logic on top of the core algorithms.