✦ True solar time · Four Pillars of Destiny
Your true birth hour.
The clock on the wall is not the hour that casts your BaZi. We calibrate civil time to true solar time, then the Four Pillars.
Born Hour takes the time on the birth record, applies the birthplace timezone and longitude, then the equation of time. Only after that true solar instant do we cast the Four Pillars.
Cast my true birth hour