What if I was born on the cusp?

If you were born on the day the sun changes signs (e.g., April 20th), you are 'on the cusp'. However, mathematically, the sun is only in one sign at a specific time. To know for sure, you need your exact birth time and place to calculate the precise position of the sun.

Why do dates vary slightly between websites?

The sun doesn't change signs at the exact same time every year because a year is 365.25 days. Leap years shift the timing. This calculator uses the standard tropical zodiac dates, which are accurate for the vast majority of people.

Is there a 13th sign (Ophiuchus)?

In Astronomy, yes, the sun passes through Ophiuchus. In Western Astrology (Tropical Zodiac), no. The Zodiac is a symbolic division of the sky into 12 equal 30-degree segments, not a direct mapping of the current constellations. Your sign remains valid within the astrological system.

Your Sun Sign represents your core personality, ego, and the essence of who you are. It's the most common sign people know, but a full birth chart also includes Moon (emotions) and Rising (outer mask) signs.

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Zodiac Sign Calculator

Instantly discover your Sun Sign based on your birth date. Understand your core personality traits and astrological identity.

Enter Your Birth Date

Understanding Your Zodiac Sign

Your Zodiac sign, also known as your Sun sign, is determined by the position of the sun at the exact moment of your birth. In Western Astrology, the sky is divided into 12 sections of 30 degrees each, starting with Aries at the Spring Equinox.

While your Sun sign describes your core essence and "who you are," it's just one part of the puzzle. A complete astrological profile also considers your Moon sign (your emotional inner world) and your Rising sign (how you present yourself to others).

The Four Elements

Fire (Aries, Leo, Sagittarius): Passionate, dynamic, and temperamental.
Earth (Taurus, Virgo, Capricorn): Grounded, practical, and loyal.
Air (Gemini, Libra, Aquarius): Intellectual, communicative, and social.
Water (Cancer, Scorpio, Pisces): Emotional, intuitive, and sensitive.

💡 Expert Tips

Born on the Cusp?

If your birthday falls on the first or last day of a sign (e.g., Jan 20 or Feb 18), you are "on the cusp." The sun changes signs at a specific time that varies each year. To know for sure, you'd need to cast a chart with your exact birth time.

Look Beyond the Sun

Don't dismiss astrology just because your Sun sign description doesn't fit perfectly. You might have a dominant Moon or Rising sign that influences your personality more strongly. The Sun is the engine, but the rest of the chart is the vehicle.

— Elena R., Professional Astrologer

⚠️ Common Misconceptions

"Astrology Changed Because of NASA"

Every few years, a viral story claims signs have shifted or there's a 13th sign (Ophiuchus). This confuses Sidereal Astronomy (constellations) with Tropical Astrology (seasons). Western Astrology is based on the seasons (Equinoxes/Solstices), not the current position of constellations. Your sign hasn't changed.

"I Don't Get Along With [Sign]"

Writing off an entire group of people based on Sun sign compatibility is a mistake. Compatibility is complex and involves the entire birth chart (Venus, Mars, Moon placements). Two "incompatible" Sun signs can have great chemistry if other planets align well.

Elena R.

Professional Astrologer | Updated November 2025

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