中文 EN

Four Pillars · Sexagenary Cycle

BaZi Four Pillars Calculator · 八字排盘

Enter a birth date, time, and UTC offset. This calculates the Year, Month, Day, and Hour Pillars from astronomical solar-term boundaries (Li Chun for the year, the 12 Jie for the month) and a verified Jia-Zi reference day — not from the Gregorian month number or Chinese New Year.

Date of birth (year / month / day)

Time of birth (24-hour, hour / minute / second)

UTC offset (hours)

Birthplace (optional)

Longitude °E (optional)

Day-boundary convention

Use True Solar Time for the Hour Pillar (needs longitude above; otherwise civil clock time is used)

No historical time-zone database is used — you supply the UTC offset that applied at birth.

For reference and study purposes only.