Moon Sign Calculator

Your moon sign is the zodiac sign the Moon occupied at your birth, and it changes every two and a bit days. This version uses the Moon's mean longitude, a simple linear formula that can drift up to about six degrees from the true position. Enter your birth date, the clock time and the UTC offset of the place you were born, and it returns the sign, its element and the degree within it. Because the Moon moves so fast, a birth near a sign boundary can land on the wrong side, so treat it as entertainment.