Unknown birth hour in Bazi: hour boundaries and rectification
Explains what to do when birth time is uncertain and how to compare candidate Bazi hour pillars.
When the birth hour is uncertain, compare 2 to 3 candidate hour pillars and test them against life events.
Search Intent
Searchers often know only an approximate time, especially near a double-hour boundary. Choosing one chart too early can mislead the reading.
Evidence Block
Chinese hours run in 2-hour blocks. With true solar correction, boundary births can produce at least two plausible charts.
Workflow
Correct true solar time, generate nearby candidate charts, then compare life events such as moves, education, career, relationships, and health.
Use Lingtai birth-time rectification to compare twelve possible hour candidates.
Short Answers
Can ten minutes matter?
Yes, near an hour boundary.
Can rectification prove the hour?
It can improve confidence, not replace records.
How many charts should I compare?
Usually two or three adjacent candidates.