How to Use the Zodiac Sign & Date Range Calculator
In Western astrology, your zodiac (or "sun") sign is determined by where the sun sat among the 12 constellations of the zodiac on the day you were born. There are 12 signs in total, each covering roughly a month. Enter your birthday above and this calculator instantly finds your sign along with the full date range it covers.
Sign boundary dates are technically based on the sun's real position, so they can shift by about a day from year to year — but this calculator uses the standard dates most commonly used in everyday astrology. Aries, for example, runs from March 21 to April 19, and a few signs like Capricorn span the turn of the calendar year. If you were born right on a cusp date, your exact sign can occasionally depend on the precise time of birth.
Your zodiac sign (set by birth month and day) and your Chinese zodiac animal (set by birth year) are two entirely separate systems, even though people often mix them up — use your birthday for sign-based horoscopes and your birth year for anything related to your Chinese zodiac animal.
The 12 signs are further grouped into four elements: Fire (Aries, Leo, Sagittarius), Earth (Taurus, Virgo, Capricorn), Air (Gemini, Libra, Aquarius), and Water (Cancer, Scorpio, Pisces) — signs sharing an element are traditionally thought to share similar temperaments, one of the more fun quirks of Western astrology.
Frequently Asked Questions
If you were born on a cusp date (like March 21 or April 20), the exact sign can shift by a day depending on the sun's real position that year. This calculator uses the most widely used standard Western astrology dates.
No, they're different systems. Your zodiac (sun) sign is based on your birth month and day in Western astrology, while your Chinese zodiac animal is based on your birth year in the East Asian 12-animal cycle.