ChatGPT Saju Prompt With Your Real Four Pillars

A Four Pillars reading is only as useful as the chart underneath it. A language model can produce a smooth explanation while starting from the wrong year, month, day, or hour pillar. The result may sound personal, but it is describing a different chart.

The first trap is Ipchun, the solar term that opens the Saju year. It does not begin at midnight on January 1, or even at one fixed moment every February. The boundary moves between February 3 and February 4 from year to year, down to a specific hour and minute. Someone born close to that instant can switch from one year pillar to the next. A date-only lookup often misses that change.

The month pillar has the same kind of problem twelve times a year. Saju months follow solar terms, not ordinary calendar months. Each boundary occurs at a calculated minute, so two people born on the same civil date can belong to different month pillars when their births fall on opposite sides of the term.

The hour pillar needs more than the number shown on a clock. A careful calculation accounts for the birth place's longitude, time zone, and daylight-saving rules in effect on that date. That correction can move the effective birth time across a two-hour branch boundary. If the birth time is unknown, the honest answer is an unknown hour pillar, not a guessed one.

The day pillar is the anchor for the day master and much of the relationship between the other seven characters. If that pillar is off, every later explanation is organized around somebody else's chart. This page separates the jobs: the calendar engine calculates; ChatGPT receives the finished pillars and focuses on interpretation.