Example: New York winter −5, London 0
Why birth time matters
The Moon moves about 13 degrees each day and changes signs every two to three days. A time estimate is usually enough away from a sign boundary, but the exact time and historical local offset matter near a transition.
How the calculation works
StarYa converts your local birth moment to UTC, calculates the Moon’s geocentric tropical ecliptic longitude with standard astronomical algorithms, then maps each 30-degree section to a zodiac sign. It is astronomy for position and astrology for symbolic interpretation.
Privacy: this form does not ask for your name or save your birth details.