The Scales · September 23 – October 22
September 27 Zodiac Sign
Born on September 27, you're a Libra — charming, fair-minded and devoted to balance, beauty and partnership.
Zodiac sign
Element · Modality
Air · Cardinal
Decan (first)
Moon-ruled
Birthstone
Sapphire
Birth flower
Aster
Season position
Day 5 of 30
What astrology says about a September 27 birthday
September 27 is day 5 of Libra season, so astrologers link it with the sign's core character: diplomatic, fair-minded, charming, social. Traits astrologers commonly associate with Libra include diplomatic and skilled at resolving conflict; strong sense of justice and fairness; charming, gracious and socially aware.
A commonly cited growth area for Libra: avoiding necessary confrontation. For the full picture of the sign, read the Libra guide.
1st decan of Libra: Moon
Each sign is divided into three decans, 10° slices that the Sun crosses in about ten days each. September 27 falls in the first decan of Libra (about September 23 – October 2), which the traditional Chaldean system assigns to Moon. Astrologers say that adds sensitivity, intuition and emotional depth.
The Moon adds a tidal, feeling-led quality, so moods, memory and the need for a safe emotional home matter more than the sign alone would suggest.
The number 27 in numerology
The 27 is associated with vision and humanitarian instincts. A birthday on the 27th is linked to creativity, empathy and a wish to serve something bigger than yourself.
Numerology is a separate tradition from astrology and is offered here for interest.
September birthstone and flower
The modern birthstone for September is Sapphire and the commonly listed birth flower is the aster. September falls in the month of the September equinox — autumn in the northern hemisphere and spring in the southern.
Libra love and compatibility
Libra is the sign of partnership, and love is where they come alive. They are romantic, attentive and thoughtful, and they put genuine effort into creating a relationship that feels balanced and beautiful.
Astrology is a symbolic tradition, not a science, and interpretations vary between astrologers. This page is for reflection and entertainment, not prediction or advice.
Beyond your September 27 Sun sign
Your Libra Sun is one planet. Your Moon, Rising sign and the exact Moon-ruled decan details live in your full natal chart. Get yours free on Skygram.
Get my free birth chartSeptember 27 birthday FAQ
What zodiac sign is September 27?
September 27 falls in Libra, which runs from September 23 to October 22 in the tropical zodiac. The Sun changes sign at a slightly different moment each year, so the boundary can fall a day or so either side of these dates. If you were born close to the edge, your birth year, time and place decide it.
Is September 27 a cusp birthday?
Not by the usual definition, which counts the first and last couple of days of a sign. September 27 is day 5 of Libra season, so it is normally read as a clear Libra birthday.
Which decan is September 27?
September 27 is in the first decan of Libra (September 23 – October 2). In the traditional Chaldean system this decan is ruled by Moon, which astrologers say adds its own flavour to Libra. Some modern astrologers assign decan rulers by element instead, which gives different planets, and decans are strictly 10° slices of the zodiac, so the date range is approximate.
What are the birthstone and flower for September?
The modern birthstone for September is Sapphire and the birth flower is the aster. These come from calendar tradition rather than astrology, and the lists vary by country and source.