Zodiac Sign Calculator

Written byOleh Soloninupdated 25 September 2026

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 from a fixed table of dates, with its element and the boundaries the calculator uses.

Western astrology's signs are tied to the tropical circle: the ecliptic is split into twelve equal 30° sectors counted from the spring equinox point; the calendar periods therefore come out of different lengths. 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.

How to use

Enter the date of birth.
Read off the sign, its element and the dates of that sign's period.
If the date is on the boundary between two signs, check when the Sun crossed that sign's 30° boundary in the year of birth.

Signs, dates and elements

Each row is a separate run for a date inside the sign. The boundaries are the ones the calculator uses.

Every row comes from the calculator on this page.
Sign	Dates	Element
Aries	21.03–19.04	fire
Taurus	20.04–20.05	earth
Gemini	21.05–20.06	air
Cancer	21.06–22.07	water
Leo	23.07–22.08	fire
Virgo	23.08–22.09	earth
Libra	23.09–22.10	air
Scorpio	23.10–21.11	water
Sagittarius	22.11–21.12	fire
Capricorn	22.12–19.01	earth
Aquarius	20.01–18.02	air
Pisces	19.02–20.03	water

What this calculator shows

The zodiac sign and its element
The period boundaries the calculator uses for that sign
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?

You need the moment the Sun crossed that 30° boundary in your year, allowing for the time of birth and the time zone: the boundary shifts by a day.

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.

What sign is someone born on 22 September?

Virgo by the calculator's table: Virgo runs to 22 September and Libra starts on the 23rd. In years when the equinox falls on 22 September, though, someone born after that moment counts as Libra in astrology.

What sign is 31 December?

Capricorn. By the calculator's table it runs from 22 December to 19 January, across New Year.

Worked example

Born on a boundary

Input: 23 September 1995

Output: Libra, element air, running 23.09 to 22.10

Note: By the table 22 September is still Virgo and the 23rd is Libra. The real boundary is the moment of the autumn equinox, which falls on 22 or 23 September depending on the year, so anyone born on those days should check their own year.

Useful links

All tools in Date & Time World Clock Time Difference

Zodiac Sign Calculator

Result

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