If you were born on October 21, your zodiac sign is Libra, the seventh sign of the zodiac, ruled by Venus, the planet of love, beauty, and harmony. Libra season runs from September 23 to October 22, and those born on October 21 fall at the cusp of Libra and Scorpio — known as the Cusp of Drama and Criticism. This gives October 21 individuals a fascinating mix of charm, intensity, and ...