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Enter your birth date and time to get the stem and branch of your year, month, day and hour pillars, plus your birth double-hour.
Year pillar: Li Chun (around 4 February) is the boundary. Born before it, you take the previous year’s stem and branch.
Month pillar: months change at the solar terms, not at lunar months. For example, the Mao month starts at Jing Zhe.
Day and hour pillars: days follow the 60-day cycle and change at 11 PM; the hour pillar depends on which two-hour period you were born in.
Born 4 February 1990 at 10:00 in Taipei: this is still before Li Chun, so the year pillar is Ji Si, not 1990’s Geng Wu. The month pillar is Ding Chou and the day pillar Geng Zi; 10:00 falls in the Si double-hour (09:00–10:59), so the hour pillar is Xin Si.
Enter your birth date and time; the year changes at Li Chun, months at solar terms and the day at 11 PM. Working from the zodiac or lunar year alone often goes wrong for people born in January, February or near a solar term.
The Zi double-hour runs from 11 PM to 1 AM. This site changes the day at 11 PM, so if you were born after 11 PM your day pillar belongs to the next day.
The BaZi year changes at Li Chun, while the zodiac year is usually counted from Lunar New Year. The two are often days or weeks apart, so people born in between get different answers.
Yes. You’ll first see the pillars that stay the same all day. The hour pillar, and a day pillar that may change after 11 PM, need the birth hour.