What birth data is required?

Gregorian date, hour (or clock time), and gender for each person; city optional for solar time.

紫微 Synastry · Dual Natal Charts

Synastry = two full charts compared by palace rulers and transformations.

Each person receives a full twelve-palace chart. The engine cross-checks spouse and happiness palaces, major stars, and selected 四化 patterns.

Use share URLs with ay/by query prefixes to reopen the same couple result.

What birth data is required?: Gregorian date, hour (or clock time), and gender for each person; city optional for solar time.