Case 20 of 26
Unknown birth time
Unknown time near Lichun: disclose the remaining boundary risk
A date close to a major boundary must not turn an internal placeholder into certainty.
Boundary question
Can a three-pillar result still require record review near a day or solar-term boundary?
Yes. The public case shows only Bing-Wu, Geng-Yin, and Ji-You (丙午 庚寅 己酉) and explains that an unknown real time can affect time-sensitive conclusions.
Synthetic input
Recorded facts
- Date
- 2026-02-04
- Recorded time
- Unknown
- Location
- 120°E reference meridian
- Time zone
- Asia/Shanghai
- Longitude
- 120.0000°
- Gender input
- Female
The engine uses an internal noon placeholder to obtain a date-level reference. That placeholder is deliberately not presented as a recorded birth time.
Pinned expected facts
Verified output
Year
丙午
Month
庚寅
Day
己酉
Hour
?
- Day Master
- Reference only: 己
- True solar time
- Withheld — birth time unknown
- Total correction
- Withheld — birth time unknown
- Historical offset
- Withheld — birth time unknown
- Luck direction
- Withheld — birth time unknown
- Reference Jie
- Withheld — birth time unknown
- Luck start
- Withheld — birth time unknown
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.
With an unknown time, even the displayed date-level reference can require review near a true-solar day or solar-term boundary. No Hour Pillar or exact Luck Pillar start should be inferred from this page.
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