Private astrology calculator
Moon Sign Calculator
The Moon moves quickly. This calculator checks the whole local birth day when the time is unknown.
Methodology
Transparent rules, local inputs
Moon Sign uses a tropical, geocentric longitude from Astronomy Engine. With no birth time, ChartOdyssey reports whether the sign stays stable across the complete local day and withholds a degree-level result. Birth details remain in this browser and are never sent to an external calculation service.