What you need before you start
Before starting, confirm that dates, times, and other details are accurate, and note which items are required or optional. Do not replace missing required information with a guess.
Birth date
date required
Calculates the year, month, and day pillars and lunar conversion.
Example: 1990-06-15
What to enter: Must be a valid Gregorian date no later than the current moment.
If you leave it out: No pillar can be calculated.
Birth time (local clock)
time required
Calculates the day-boundary case and hour pillar from local clock time.
Example: 12:00
What to enter: Must be precise to the minute; boundary cases need comparison.
If you leave it out: A reviewable day and hour record cannot be produced.
