Case 13 of 26
True-solar crossings
Jiamusi: correction crosses into the next day
An eastern longitude can push a late civil record beyond midnight.
Boundary question
Can 23:30 civil time become the following solar date?
Yes. The true solar result is 00:27 on the next date, and the Day Pillar follows that normalized date.
Synthetic input
Recorded facts
- Date
- 2025-11-10
- Recorded time
- 23:30
- Location
- Jiamusi, China
- Time zone
- Asia/Shanghai
- Longitude
- 130.3616°
- Gender input
- Female
Pinned expected facts
Verified output
Year
乙巳
Month
丁亥
Day
甲申
Hour
甲子
- Day Master
- 甲
- True solar time
- 2025-11-11 00:27
- Total correction
- 57.28 minutes
- Historical offset
- UTC+08:00 · DST 0 min
- Luck direction
- 顺排
- Reference Jie
- 大雪 · 2025-12-07 05:04:37
- Luck start
- 2034-08-03 03:09:16
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