Case 22 of 26
Luck direction and nearby Jie
Yang year plus female: reverse Luck Pillars
The same synthetic moment changes direction when gender changes.
Boundary question
Which direction does a female chart with a Yang year stem use?
The pillars remain the same, but the direction reverses and the reference Jie changes to the preceding Liqiu.
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
- Female
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
- 逆排
- Reference Jie
- 立秋 · 1990-08-08 02:45:32
- Luck start
- 1994-10-01 08:14:11
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