Case 09 of 26
Historical time zones
Lord Howe: a 30-minute DST offset
Not every daylight-saving transition is a full hour.
Boundary question
Does the time-zone adapter preserve Lord Howe's 30-minute DST rule?
Yes. The receipt records UTC+11:00 with a 30-minute DST component instead of assuming 60 minutes.
Synthetic input
Recorded facts
- Date
- 2025-01-15
- Recorded time
- 12:00
- Location
- Lord Howe Island, Australia
- Time zone
- Australia/Lord_Howe
- Longitude
- 159.0800°
- Gender input
- Female
Pinned expected facts
Verified output
Year
甲辰
Month
丁丑
Day
甲申
Hour
庚午
- Day Master
- 甲
- True solar time
- 2025-01-15 11:27
- Total correction
- -32.31 minutes
- Historical offset
- UTC+11:00 · DST 30 min
- Luck direction
- 逆排
- Reference Jie
- 小寒 · 2025-01-05 10:32:47
- Luck start
- 2028-05-20 01:15:41
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