♍︎ Sun at ~28° Virgo · third decan · Mercury

September 21 zodiac sign: Virgo, not Libra

If you were born on September 21, your sign is Virgo, not Libra: from 1980 to 2030 the Sun always enters Libra on September 22 or 23, so this date is Virgo at any hour. The Sun sits about 28° into Virgo on this date, in the third decan, where Virgo's core takes on a Mercury flavour. Here's what the date fixes, and what only your birth time can tell you.

Your sign: Virgo

The mutable earth sign that notices everything and refines until it works.

A Virgo Sun has an analytical mind paired with a service orientation — a rare combination. You're the person who actually reads the manual, who notices what's off in the system, who stays late to make sure the thing works the way it's supposed to. You're not loud about it. You just do the work.

The date fixes the Sun; the year and hour fix the rest. A Virgo born September 21 with the Moon in Pisces runs on a different inner weather from one with the Moon in Virgo: see Virgo Sun, Pisces Moon. Your rising sign needs the birth time; the twelve Virgo Sun combinations show what each one changes.

Virgo dates, traits & compatibility → · What a Virgo birth chart looks like →

In the US (2000–2014), an average of 12,071 babies were born on each September 21, rank 35 of 366 dates; Virgo is number 2 of 12 signs (8.94%). What's the most common zodiac sign?

The Moon on September 21, 1980–2030

Across the 51 years from 1980 to 2030, the Moon at noon UTC on September 21 was most often in Gemini, Cancer, and Sagittarius (6 years each) and least often in Aries, Taurus, Virgo, and Libra (3 years each). Unlike the Sun, the Moon sign depends on the birth year. On September 21, 2026, the Moon moves from Capricorn into Aquarius at 17:14 UTC.

In 20 of those 51 years (39%) the Moon changed sign during September 21 itself, so in those years the birth time decides the Moon as well as the rising sign. Cells with an arrow mark them, with the UTC time of the change. The Moon was exactly full on September 21 in 2002, and new in 2025.

Find your birth year. One sign means the Moon spent the whole UTC day there; an arrow means it changed sign that day, at the UTC time shown: born before it, the first sign; after it, the second. The Moon sign calculator settles it in seconds; your birth chart adds the rising sign and houses.

Times in UTC: a birth late in the evening in the Americas, or early in the morning in Asia, can fall on the neighbouring UTC date.

September 2026: full moon September 26, 2026, Aries · new moon September 11, 2026, Virgo.

Your decan: the third decan of Virgo

Each sign is divided into three 10° decans, and each decan has a sub-ruler that shades the sign's core. Degrees 20–30 of Virgo belong to Mercury: how you think, learn, communicate, and process information. Read it as Virgo with a Mercury accent — the earth core is unchanged, the emphasis moves.

Decan tarot card · Golden Dawn attribution

Ten of Pentacles

Legacy · Wealth · Family. The card assigned to this ten-degree slice of the zodiac — a birthday card in the same sense a sun sign is a birthday sign: one lens on the date, not a verdict.

Read the Ten of Pentacles in full on My Day Check →

All the tarot cards for September 21: decan, sign, ruling planet and year card →

What the date can't tell you

The Sun is one placement out of ten. Your Moon sign changes every two to three days, so Virgos born on September 21 in different years have different Moons; your rising sign changes every two hours and needs a birth time and place. Those two carry most of what people mean by "personality" in a chart.

Born September 21? Add your year, time and place

Your Moon and rising depend on the year and hour. Computed here in a few seconds — then your full chart with a preview of its reading, no sign-up.

Or browse the twelve possibilities: Virgo Sun with each Moon → · just my Moon sign · how the free birth chart calculator works

Classic matches for a September 21 birthday

By sun sign, Virgo pairs most easily with Taurus, Capricorn, Cancer, Scorpio. Sun-sign compatibility is the coarse layer; the couple reading compares both full charts.

Common questions

What zodiac sign is September 21?

September 21 is Virgo, the mutable earth sign ruled by Mercury. The Sun sits at roughly 28° Virgo on this date, in the third decan.

What decan is September 21?

The third decan of Virgo (20°–30°), sub-ruled by Mercury. Decans divide each sign into three 10° slices; the sub-ruler adds a second flavour to the sign's core — here how you think, learn, communicate, and process information.

What tarot card is September 21?

In the Golden Dawn system each decan has a minor arcana card: for the third decan of Virgo it is the Ten of Pentacles (legacy, wealth, family). It's a birthday card in the same way a sun sign is — one lens, not a verdict.

What Moon sign is someone born on September 21?

It depends on the year, and in 39% of years on the hour too. For example: in 1980, Aquarius; in 1990, Libra or Scorpio; in 2000, Gemini or Cancer; in 2010, Pisces; in 2020, Scorpio or Sagittarius. Over 1980–2030 the Moon on September 21 was most often in Gemini, Cancer, and Sagittarius. A birth time and place pin it down.

Does everyone born on September 21 have the same chart?

No. They share the Sun in Virgo, but the Moon changes sign every two to three days, the rising sign every two hours, and the outer planets by year. Two people born September 21 in different years can have almost nothing else in common in their charts.