Aquarius Dates, Decans & Cusp Signs

Aquarius season runs from January 20 to February 18, bringing fixed air energy devoted to innovation, community, and humanitarian vision. While every Aquarius shares an independent core, the exact birth date within this window changes personality through the decan system. Each decan spans about ten days and carries its own sub-ruler that tints the Aquarius archetype.

The first decan of Aquarius runs January 20 to January 29 and is ruled by Uranus with traditional co-rulership from Saturn. These are the most quintessentially Aquarian natives: original, rebellious, futuristic, intellectually independent, and socially progressive. They are natural inventors, activists, and community builders. They pair vividly with Gemini and Libra, who share their love of ideas.

The second decan spans January 30 to February 8 and is sub-ruled by Mercury, lending these Aquarians a more communicative, analytical, and curious streak. They blend Aquarian vision with Geminian wit, often becoming writers, journalists, technologists, and educators. They love a good debate and harmonize strongly with Gemini and Libra.

The third decan covers February 9…

The third decan covers February 9 to February 18 and is sub-ruled by Venus, giving these Aquarians a softer, more partnership-oriented, and aesthetically refined quality. They share resonance with Libra, often gravitating toward design, diplomacy, and the arts. They love freedom inside partnership and pair memorably with Libra and Gemini.

Cusp births add further dimension. Those born January 16 to 22 sit on the Capricorn-Aquarius cusp, the Cusp of Mystery and Imagination. They merge Capricorn ambition with Aquarian innovation, creating visionary entrepreneurs who build new systems with old-school discipline. They are independent and quietly revolutionary.

Those born February 15 to 21 sit on the Aquarius-Pisces cusp, the Cusp of Sensitivity. They combine Aquarian vision with Piscean compassion, producing artists, healers, and humanitarians who feel the world deeply and act on it. They are dreamy yet socially engaged, often pioneering causes others overlook.

Decans refine Aquarius compatibility

Decans refine Aquarius compatibility. A first-decan Aquarius may feel happiest with a fellow Uranian original, while a second-decan Aquarius craves Geminian banter and a third-decan Aquarius finds chemistry with charming Libra. Two Aquarians born weeks apart can have very different relationship styles, which is why decan-aware compatibility outperforms generic sun-sign advice. Knowing whether you are a Uranus, Mercury, or Venus Aquarius helps you choose partners, careers, and causes that align with your true rhythm rather than the broad Aquarius stereotype that often reduces the sign to emotional detachment and misses its genuine warmth, loyalty, and capacity for revolutionary love that quietly changes both individual lives and entire communities for generations forward.