Case 21 of 26
Luck direction and nearby Jie
Yang year plus male: forward Luck Pillars
One half of the polarity-and-gender direction matrix.
Boundary question
Which direction does a male chart with a Yang year stem use?
The Geng (庚) Yang year stem plus male input produces forward sequence and selects the next relevant Jie, Bailu.
Synthetic input
Recorded facts
- Date
- 1990-08-20
- Recorded time
- 12:00
- Location
- 120°E reference meridian
- Time zone
- Asia/Shanghai
- Longitude
- 120.0000°
- Gender input
- Male
Pinned expected facts
Verified output
Year
庚午
Month
甲申
Day
丁巳
Hour
乙巳
- Day Master
- 丁
- True solar time
- 1990-08-20 10:56
- Total correction
- -63.81 minutes
- Historical offset
- UTC+09:00 · DST 60 min
- Luck direction
- 顺排
- Reference Jie
- 白露 · 1990-09-08 05:37:28
- Luck start
- 1996-11-23 21:30:11
Conventions and limits
What this case does — and does not — prove
It verifies
Deterministic reproduction of this input under the named engine version and conventions. A pinned-field mismatch stops the production build.
It does not claim
Universal agreement across Bazi schools, interpretation of a real person, or certainty where the historical record is incomplete.
tyme4ts 1.5.2 · cantian-tymext 0.0.27 · sect 2 day boundary · BaziCalculator.ai NOAA/IANA true-solar adapter
calculation-benchmarks-v1 · reviewed 2026-09-05