天文暦エンジン。出生データを選択 — 真太陽時と晩子時間（夜子）の流派に対応。
A bazi (Four Pillars of Destiny) chart maps the year, month, day and hour of your birth into eight characters — four heavenly stems and four earthly branches. It is the core system of Chinese destiny analysis.
Yes. Casting the chart, the five-element balance and the ten gods is free and unlimited. The optional AI reading shares the free daily quota of 3 answers per day.
Yes. Enter your birth city longitude and the calculator applies the true solar time correction before casting, the way classical practitioners adjust for local sun time.
Yes. Check "I don't know my birth time" and the chart casts on the day pillar with the hour marked unknown; time-dependent parts are skipped honestly.
Your day master is the heavenly stem of your birth day — the element that represents you in the chart. Cast your chart and it is highlighted in the day pillar.