🔧 The Hard Part of a Global Birth-Chart Calculator Was Time

A birth-chart form looks simple: ask for a date, time, and place, then calculate.

The interface may be simple. The input is not.

1992-11-01 01:30 does not identify one universal instant. It is a wall-clock reading that only becomes meaningful after you resolve the place, the historical time-zone rule, and any daylight-saving transition. If the...