Zodiac Seasons Calendar: When Is the Sun in Each Sign?

“When does Virgo season start?” and “I was born on September 22 — am I Virgo or Libra?” often produce slightly different answers online.

That is normal.

Zodiac seasons are not fixed calendar boxes that switch at midnight. In the tropical zodiac, a new season begins at the actual instant the Sun's calculated ecliptic longitude enters the next 30-degree sector.

So:

“Aries always begins at midnight on March 21.”

is not technically accurate.

Use date ranges as a guide. For a boundary birth, calculate the Sun's actual longitude.

What does “zodiac season” mean?

The tropical zodiac divides the 360-degree ecliptic circle into twelve equal sectors.

Each is:

30°

wide.

• Aries: 0°–30°
• Taurus: 30°–60°
• Gemini: 60°–90°
• Cancer: 90°–120°
• Leo: 120°–150°
• Virgo: 150°–180°
• Libra: 180°–210°
• Scorpio: 210°–240°
• Sagittarius: 240°–270°
• Capricorn: 270°–300°
• Aquarius: 300°–330°
• Pisces: 330°–360°

When the Sun's tropical ecliptic longitude enters one of these sectors, that sign's “season” begins.

Approximate zodiac-season calendar

These dates are general guides. Exact ingress dates and times can vary by year and local time zone.

Being born on a boundary date does not mean you have two Sun signs.

At a specific instant, the Sun has one calculated longitude.

Calculate your Sun sign

Why aren't the dates identical every year?

Our calendar year and Earth's orbital cycle are not exactly the same length.

NASA gives Earth's orbital year as about 365.25 days.

Our civil calendar uses:

• 365 days most years,
• 366 days in leap years.

And because a zodiac ingress is a specific astronomical instant, time zones can shift the local calendar date.

Suppose the Sun enters a sign at:

September 22, 23:30 UTC

It is already September 23 in parts of Europe and Asia, while it remains September 22 across much of North America.

Same astronomical event, different local date.

Why is Aries season especially important?

In the tropical zodiac:

0° Aries = the March equinox point.

That makes the start of Aries the zero point of the tropical zodiac.

NASA reports the 2026 March equinox at March 20, 2026, 14:46 UTC.

This is a useful example because it shows why the memorized phrase “Aries starts March 21” is not a universal exact rule.

The remaining 30-degree tropical sectors are measured from that zero point.

Why do Cancer, Libra, and Capricorn begin near seasonal turning points?

The four cardinal sign beginnings correspond to four tropical seasonal markers:

This is part of the structure of the tropical zodiac.

But be careful with hemisphere language.

The March equinox is associated with:

• spring in Toronto or London,
• autumn in Sydney or Melbourne.

The zodiac coordinate stays the same, while the local physical season is reversed between hemispheres.

Think: When astrology says “Aries brings spring energy,” do you notice that the phrase is often written from a Northern Hemisphere perspective?

If I was born on a “cusp,” do I have two Sun signs?

Not in the standard technical calculation.

The Sun might be:

• 29°59' Virgo

or

• 0°00' Libra.

It is not simultaneously at both longitudes.

“Cusp personality” is a popular astrology idea, but it does not change the underlying Sun-sign calculation.

For a boundary birth, use:

• date,
• preferably birth time,
• correct time conversion

to calculate the actual solar longitude.

Why do two sites list zodiac dates one day apart?

Several possibilities.

1. One site uses a fixed date table

For example:

Virgo: Aug 23–Sep 22

every year.

Simple, but not exact on boundary days.

2. Another site calculates that year's actual ingress

More precise.

3. They display different time zones

One event can appear on different local dates.

4. They use different zodiacs

Tropical and sidereal systems label the Sun differently.

That is a method difference, not a calendar typo.

Is every zodiac season exactly 30 days long?

No.

Each zodiac sector is exactly 30 degrees, but the Sun's apparent ecliptic speed is not perfectly constant over the year.

Earth's orbit is slightly elliptical rather than a perfect circle.

So moving through each 30-degree sector does not take precisely the same number of hours.

“About one month per sign” is the useful approximation.

How are zodiac seasons interpreted in astrology?

From here we move from astronomical coordinate to astrological symbolism.

Traditional season themes often look like:

• Aries → initiation, action
• Taurus → continuity, resources
• Gemini → information, communication
• Cancer → belonging, care
• Leo → visibility, creativity
• Virgo → order, usefulness
• Libra → relationship, balance
• Scorpio → intensity, sharing
• Sagittarius → exploration, meaning
• Capricorn → structure, responsibility
• Aquarius → systems, community
• Pisces → release, empathy

That does not mean:

“Everyone becomes organized in Virgo season.”

A more practical use is:

“Where would I like to improve a system this month?”

Is a zodiac season the same as a personal transit?

No.

“The Sun entered Libra” is the same current-sky event for everyone.

A personal interpretation also asks:

• Which natal house contains Libra?
• Is the transiting Sun aspecting a natal planet?
• What does the natal chart repeat?

That is why:

“Libra season means everyone will enter a relationship.”

is too broad.

A practical way to use the 12 seasons

Treat them as a twelve-part annual review.

Ask one question per season:

• Aries: What am I starting?
• Taurus: What am I making sustainable?
• Gemini: What am I learning?
• Cancer: Where do I need belonging?
• Leo: What am I willing to make visible?
• Virgo: What can I organize?
• Libra: Where do I need balance?
• Scorpio: What needs deeper examination?
• Sagittarius: Where do I want to expand?
• Capricorn: Which structure am I building?
• Aquarius: Which old system should I question?
• Pisces: What am I ready to release or accept?

These questions come from astrological symbolism.

They are not outcome guarantees.

Think: Does a zodiac-season post give you a useful behavioral question, or only a list of events it claims will happen to you?

Why aren't zodiac dates the same thing as birthdays?

“Zodiac dates” are simplified calendar versions of the Sun's annual ingress moments.

So births near transition dates should not be classified from a generic chart alone.

The actual solar position is more reliable.

You might also like: Sun, Moon and Rising Sign: What's the Difference? · Why Is My Zodiac Sign Different on Another Site? Tropical vs. Sidereal Zodiac · Is There Really a 13th Zodiac Sign? Where the Ophiuchus Claim Comes From

Frequently asked questions

Do zodiac seasons begin on exactly the same date every year?

They begin in roughly the same period, but the exact UTC time and sometimes the local calendar date vary. Earth's orbit takes about 365.25 days, while the civil calendar uses leap-year corrections.

Is everyone born on March 21 an Aries?

Not automatically. Check the exact year, birth time, and the Sun's calculated tropical longitude. In many years the Aries ingress occurs on March 20.

If I was born on September 22, am I Virgo or Libra?

A generic date table is not enough. Calculate the Sun's actual tropical ecliptic longitude for that birth time.

Is a zodiac season the same thing as a constellation?

No. Tropical zodiac seasons use twelve equal 30-degree sectors. Astronomical constellations are unequal official sky regions.

Do zodiac seasons change in the Southern Hemisphere?

The zodiac longitudes do not change. But physical seasons are reversed, so Northern Hemisphere phrases such as “Aries is the start of spring” do not describe the same local season in Australia.

Can I find my Sun sign without a birth time?

On most dates, yes. On a day when the Sun changes signs, birth time can determine the result, so use the most accurate time available.

Quick summary

• Tropical zodiac seasons are based on the Sun moving through twelve equal 30-degree sectors.
• Published date ranges are approximations; exact ingress times vary slightly from year to year.
• 0° Aries corresponds to the March equinox, 0° Cancer to the June solstice, 0° Libra to the September equinox, and 0° Capricorn to the December solstice.
• A boundary birthday does not create two Sun signs; calculate the actual degree.
• Zodiac seasons are more useful as a twelve-part reflection rhythm than as a guaranteed event calendar.