Zodiac Sign Calculator

Birth date

Result

Zodiac signLibra
Elementair
Period of the signfrom 23.09 to 22.10
Next signScorpio
Date1995-09-23
Day of the weekSaturday

Sign boundaries and what is wrong with them

Gives the zodiac sign for a birth date along with its element and the exact boundaries of its period.

Western astrology's signs are tied to the tropical circle: the year is split into twelve equal stretches from the spring equinox. That is where the familiar dates come from — Aries from 21 March, Taurus from 20 April, and so on.

The boundary dates drift by a day: the equinox falls on the 20th in some years and the 21st in others. So anyone born on the first or last day of a sign should check the exact moment for their year rather than a general table.

What this calculator shows

The zodiac sign and its element
The exact boundaries of that sign's period
The following sign and the weekday of the date given

What to keep in mind

The dates are for the tropical zodiac used in Western astrology; the sidereal zodiac sits about 24 degrees away.
Boundaries are averages: precession and leap years shift them by a day from one year to the next.

FAQs

How do I find my zodiac sign?

From your birth date and a boundary table: each sign covers about a month, starting somewhere around the 20th to the 23rd.

What if I was born on a boundary?

Check the exact moment of the equinox or solstice in your year — the boundary shifts by a day. Astrologers also look at the time of birth in those cases.

What are the elements?

Fire — Aries, Leo, Sagittarius; earth — Taurus, Virgo, Capricorn; air — Gemini, Libra, Aquarius; water — Cancer, Scorpio, Pisces.

Why do the constellations not match the signs?

Because of the precession of the Earth's axis: over two thousand years the equinox point has moved almost a full sign. Western astrology stayed tied to the equinox rather than to the constellations.

Worked example

Born on a boundary

Input: 23 September 1995

Output: Libra, element air, running 23.09 to 22.10

Note: The first day of Libra is exactly the case where a table can be wrong. In 1995 the autumn equinox fell on 23 September, but in other years it lands on the 22nd and the same date belongs to Virgo.

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Zodiac Sign Calculator

Result

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