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The 12 Zodiac Signs, Their Dates, and What They Mean

Nearly everyone knows their "sign," even people who do not follow astrology at all. Here is what the 12 signs actually are and how the system is put together.

Your "sign" is really your sun sign

The zodiac sign most people know is your sun sign β€” determined only by the sun's position on your birth date. A full astrological chart also factors in the moon and every other planet's position, which is why astrologers distinguish a casual "sign" from a complete birth chart.

Aries through Virgo

Aries (Mar 21-Apr 19), Taurus (Apr 20-May 20), Gemini (May 21-Jun 20), Cancer (Jun 21-Jul 22), Leo (Jul 23-Aug 22), Virgo (Aug 23-Sep 22). Exact boundary dates commonly shift by a day depending on the year and source.

Libra through Pisces

Libra (Sep 23-Oct 22), Scorpio (Oct 23-Nov 21), Sagittarius (Nov 22-Dec 21), Capricorn (Dec 22-Jan 19), Aquarius (Jan 20-Feb 18), Pisces (Feb 19-Mar 20). As above, treat these as approximate rather than fixed to the day.

Grouped into four elements

Fire (Aries, Leo, Sagittarius), Earth (Taurus, Virgo, Capricorn), Air (Gemini, Libra, Aquarius), and Water (Cancer, Scorpio, Pisces) β€” a traditional grouping said to describe a sign's general temperament.

Also grouped into three modalities

Cardinal signs (Aries, Cancer, Libra, Capricorn) start each season, Fixed signs (Taurus, Leo, Scorpio, Aquarius) fall mid-season, and Mutable signs (Gemini, Virgo, Sagittarius, Pisces) close out each season β€” a second, independent way of grouping the same 12 signs.

Western astrology uses the tropical zodiac

Mainstream Western astrology (the version behind this list) fixes signs to the seasons using the tropical zodiac. Vedic (Indian) astrology instead uses a sidereal zodiac tied to actual constellation positions, which has drifted from the tropical dates over centuries β€” this is why a sidereal chart can assign a different sign than a tropical one for the same birthday.

The system dates back to ancient Babylon

The basic 12-sign framework originated with Babylonian astronomers roughly 2,500 years ago and was later adopted and elaborated by Hellenistic Greek astrology, which shaped most of the sign meanings still referenced today.

No mainstream scientific evidence supports it

Controlled studies have not found reliable evidence that birth-date-based sun signs predict personality traits or life outcomes. Astrology remains widely popular as a cultural and entertainment framework, but it is not treated as an evidence-based personality science.

One birthday, several overlapping systems

A single birth date simultaneously belongs to one of 12 signs, one of four elements, and one of three modalities β€” three separate classification layers laid over the same 12-sign calendar, which is part of why astrology can describe someone many different ways from just one piece of information.

Why sign boundary dates sometimes look slightly different

The sun does not cross into the next zodiac sign at the exact same calendar moment every year, so a birthday that falls right on a boundary (a "cusp") can technically land in either sign depending on the specific year and time of birth β€” which is why different sources sometimes list boundary dates a day apart.

Frequently Asked Questions

Is my zodiac sign the same as my full astrological chart?

No. Your sign is based only on the sun's position on your birthday. A full chart also maps the moon and every planet's position at your exact birth time and location, which astrologers treat as a much more complete picture.

Why might my sign differ from what a Vedic astrology app tells me?

Western astrology uses the tropical zodiac, tied to the seasons, while Vedic astrology uses the sidereal zodiac, tied to actual constellation positions. The two have drifted apart over time, so they can assign different signs to the same birthday.

Is there scientific evidence that zodiac signs predict personality?

No reliable scientific evidence supports that claim. Astrology is widely enjoyed as a cultural and entertainment tradition, but it is not considered an evidence-based framework for predicting personality or life events.