September is Virgo until the equinox and Libra afterwards. People born from 1 to 22 September are Virgo; people born from 23 to 30 September are Libra. The dividing moment is the September equinox, when the Sun crosses the celestial equator heading south and enters Libra, the sign of the scales, on the one day of the season when light and dark are in balance.

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The moment the Sun enters Libra, for each birth year

Universal Time (UTC). Add or subtract the time zone of the birthplace.

The decans of September

Virgo Through the 22nd, Libra from the 23rd

Virgo is mutable earth, ruled by Mercury: analytical, conscientious and useful. Libra is cardinal air, ruled by Venus: sociable, fair-minded and concerned with harmony between people. Virgo sorts and corrects, Libra weighs and reconciles. The first half of the zodiac, which deals with the individual, ends with Virgo; with Libra the second half begins, and its first subject is the other person.

The Equinox Decides

Since the first degree of Libra is the equinox point, the boundary is measured, not agreed. From 1940 to 2040 it fell on 23 September in 68 years and on 22 September in 33, in Universal Time, and the 22nd has become frequent since the turn of the century. A birth on either day needs the year and the clock time. In the Americas the equinox often arrives on the evening of the 22nd local time even when the world clock already shows the 23rd.

September Virgo and September Libra

September Virgos are the ones astrology calls precise and dependable: good with detail, health-minded, self-critical, kinder in deeds than in words. September Libras, born in the last week, are more outward-facing. They are described as diplomatic, charming and attentive to appearances, uncomfortable with conflict and slow to choose because they see both sides. What the month has in common is a sense of proportion. Virgo wants things correct and Libra wants them fair.

September in the Calendar and the Sky

The name means the seventh month, a relic of the Roman calendar that began in March. The birthstone is the sapphire and the flowers are the aster and the morning glory. At the equinox the Sun rises due east and sets due west all over the world, and day and night are close to equal length. It marks the beginning of autumn in the northern hemisphere and of spring in the southern.

Frequently asked

What zodiac sign is September?

Virgo from 1 to 22 September and Libra from 23 to 30 September.

Is 23 September Virgo or Libra?

Libra more often than not. The Sun entered Libra on 23 September in 68 of the years from 1940 to 2040; in the other 33 it had entered on the 22nd.

What is the birthstone for September?

The sapphire. September's flowers are the aster and the morning glory.

September birthdays, day by day

The two signs

Zodiac signs, month by month