Calculate an approximate sidereal Moon sign from date, time and time zone.
How this works
The engine converts the entered local time to UTC, computes Moon longitude, subtracts Lahiri ayanamsa and divides the zodiac into twelve 30-degree signs.
Approximate geocentric Sun/Moon calculations using the existing Meeus-based engine and a linear Lahiri ayanamsa. Near sign/Nakshatra boundaries, verify with a precise ephemeris. This is not a full Kundli.