The quality of any BaZi reading begins with your birth data. A chart is built from the year, month, day, and hour of birth, and small errors change the pillars. Taking ten minutes to prepare accurate information before you book will make the reading noticeably more reliable.
What You Need
Collect four things: your birth date, your birth time, your birthplace, and the timezone rules that applied at that moment. The date and time are the core. The birthplace matters because traditional practice often adjusts for true solar time, and the timezone matters because standard time is not the same everywhere or in every era.
Write everything down in one message. "March 4, 1992, 7:40 AM, Shanghai, China, Asia/Shanghai" is a complete data set. "1992, Shanghai" is not.
Handle Unknown Time Honestly
If you do not know your birth time, say so before booking. The Hour Pillar changes every two hours, so a guessed time can produce a false chart. Many practitioners offer a three-pillar reading, or use rectification, which estimates the time by comparing possible charts to significant life events. Honest labeling protects both you and the reader.
If you have a parent or older relative who may remember, ask. Hospital records, baby books, and old documents are worth checking first.
Double-Check Timezone Details
Timezone rules changed in many countries, and birth certificates usually record local clock time. Tell the reader whether the time is standard time, daylight saving time, or unknown. If the reader adjusts for true solar time, the birthplace longitude matters too. Providing the city is usually enough.
When in doubt, provide what you have and let the practitioner calculate the adjustments. Do not try to "fix" the time yourself.
Before You Pay
Ask the practitioner what data they need and how they handle missing time. Ask how long the reading takes and what format you will receive. A professional should be able to answer these questions clearly. If a practitioner promises specific events without even confirming your data, treat it as a warning sign.
FAQ
Is birthplace really necessary?
It matters for solar-time adjustment in many traditions. If you only know the country, that is still useful.
What if my birth certificate uses a different calendar?
Give the date as recorded and note the calendar. Practitioners can convert dates as needed.
What should I read next?
Read What to Expect from a Written BaZi Report.
Where to Go Next
Read What to Expect from a Written BaZi Report, then visit the reports & readings section.
