Your Zodiac Sign is determined by your birth date and time. The zodiac is a map of the heavens at the time of your birth. It shows where the planets were in relation to one another and how they affected life on Earth at that time. Your Zodiac Sign remains the same over time as long as you remain alive. The zodiac signs are: Aries, Ram; Taurus, Bull; Geminis, Twins; Cancer, Crab; Leo, Lion; Virgo, Virgin; Libra, Scales; Scorpio, Scorpion; Sagittarius, Archer; Capricornus, Goat; Aquarius, Water Bearer; Pisces, Fish. Your birthday determines what zodiac sign you belong to. If you were born at midnight then you're a Scorpio. If you were born at 12am then you're a Sagittarius. We can also say that your zodiac sign changes every 2 years - when you change from a Scorpio to a Capricorn or from a Capricorn to a Aquarius. Your zodiac sign influences many aspects of your life. It affects the traits you show others and the qualities you feel toward others.