Why this chart
The same birth moment gives a different chart depending on which tradition is followed. This is what was used to produce yours, so if another service shows you something else you can see where the two part company.
The tradition this calculator follows
Most saju calculators follow the Chinese tradition. This one follows the Korean tradition, so the same birth moment can produce a different chart here than elsewhere. Neither is an error — they follow different traditions.
The traditions part company over where a day begins and which clock the hours are read against, and that shows up in the day and hour pillars.
Accuracy labels
Engine, ephemeris and tzdb versions are printed because the same input can produce a different chart under a different version — the version is part of the result.
- Exact under the declared rule
- Given the stated policies and sources, this value follows without approximation.
- Numerically approximated
- Computed by numerical methods within a small, stated tolerance.
- Source-limited
- As precise as the underlying source data allows.
- Input-uncertain
- Limited by the uncertainty of the birth data provided.
- School-dependent
- Schools use different rules here; the rule applied is declared.
A note on safety and framing
The Four Pillars is a historically transmitted symbolic and calendrical practice. The calendar and time calculations here can be audited; the interpretive claims have not been scientifically validated. Please do not use readings as the sole basis for medical, legal, financial, employment, immigration, reproductive or personal-safety decisions. When a reading conflicts with your own experience, trust your experience.
- Years between 1900 and 2200 are supported.
- Without a birth time, the hour pillar is withheld rather than invented. The other three pillars are shown in full.
- Engine, ephemeris and tzdb versions are printed because the same input can produce a different chart under a different version — the version is part of the result.