Your zodiac sign is meant to tell you where the Sun was when you were born. But most horoscopes use dates that were fixed about two thousand years ago, and the sky has moved since then. Enter your birthday below to find the constellation the Sun was really in at your birth, in the 13-sign zodiac that includes Ophiuchus.
Find Your True Zodiac Sign
Enter your date of birth to see the constellation the Sun was really in when you were born – in the 13-sign zodiac, Ophiuchus included.
Why Is My Sign Different?
The Earth's axis slowly wobbles, an effect called the precession of the equinoxes. Over the centuries it has shifted the calendar dates of the zodiac by almost a whole sign against the stars. In addition, the Sun's path crosses thirteen constellations, not twelve, and they are of very different sizes. 13-sign astrology simply follows the real sky, with the dates the Sun truly enters each constellation.
The 13 Signs and Their Dates
Pisces (March 12 – April 18), Aries (April 19 – May 13), Taurus (May 14 – June 20), Gemini (June 21 – July 20), Cancer (July 21 – August 10), Leo (August 11 – September 16), Virgo (September 17 – October 30), Libra (October 31 – November 22), Scorpio (November 23 – November 29), Ophiuchus (November 30 – December 17), Sagittarius (December 18 – January 19), Capricorn (January 20 – February 15), Aquarius (February 16 – March 11).
Frequently Asked Questions
Why do I need my time of birth?
Only if you were born on a day when the Sun moved from one constellation into the next. The calculator tells you if this is the case and gives you the exact time of the change.
What is Ophiuchus?
Ophiuchus, the Serpent Bearer, is the 13th constellation on the Sun's path. Read more in our guide to Ophiuchus season.
Where can I read about my sign?
See the traits of the 13 signs, follow the daily horoscope for the 13 signs, or discover the book Astrology of the 13 Signs of the Zodiac.