Sign 11 · Western tropical zodiac

Aquarius
January 20 - February 18

Aquarius in the Western tropical zodiac: conventional January 20 - February 18 range, Air element, Fixed modality, and clearly labeled astrological interpretations.

Astrology note: Date range, element, modality, and ruling planet describe a conventional astrological system. Personality, luck, compatibility, and career material below are interpretations—not scientific findings or predictions.

Immediate answer

Aquarius at a glance

Conventional dates: January 20 - February 18
Element: Air
Modality: Fixed
Ruling planet: Uranus (traditional: Saturn)

Calendar fact

Born near the Capricorn–Aquarius boundary?

A sign starts the moment the Sun reaches its position on the ecliptic, not at midnight on a fixed calendar date. Because the tropical year is about 365.2422 days long, that moment moves by up to about a day from one year to the next and resets with the leap-year cycle. This is why reputable tables list a sign as beginning on, for example, 20 or 21 March and both are correct for different years.

How the two boundaries around Aquarius behave, and what decides a borderline birthday.
Boundary	Dates it can fall on	What decides it
Capricorn Aquarius	January 19 or January 20	The birth year, then the birth time and time zoneNot resolvable from a date table alone
Aquarius Pisces	February 18 or February 19	The birth year, then the birth time and time zoneSame drift applies at both ends

How to read this: if a birthday falls squarely inside January 20 - February 18, the sign is Aquarius in every year. If it falls on January 19, January 20, February 18 or February 19, a published table cannot answer it and this site does not pretend otherwise. This site uses the conventional ranges for a month-and-day lookup and does not compute the Sun's exact position, which is what an ephemeris-backed natal chart does.

Astrological profile

How tradition describes Aquarius

Aquarius is the visionary of the zodiac. Those born under this sign are progressive, original, and independent thinkers who care deeply about humanitarian causes. Aquarians march to the beat of their own drum and value their individuality. They're often ahead of their time.

ProgressiveOriginalIndependentHumanitarianIntellectualUnconventionalVisionary

Traditional strengths

Common themes

Innovative thinker · Humanitarian · Independent · Intellectual · Progressive

Traditional challenges

Common cautions

Emotionally detached · Unpredictable · Stubborn · Aloof · Extremist

Astrological interpretation

Compatibility themes

Astrologers compare elements and other chart placements. This simplified sun-sign list is for exploring the tradition, not assessing a relationship.

Geminihigh in this simplified readingIntellectual air signs with great communication Librahigh in this simplified readingSocial butterflies who love ideas Sagittariushigh in this simplified readingBoth value freedom and adventure Tauruslow in this simplified readingToo different in values and needs Scorpiolow in this simplified readingEmotional intensity overwhelms Aquarius

Traditional associations

Colors, numbers, day, and symbols

Traditional numbers: 4 · 7 · 11 · 22 · 29
Traditional colors: Blue · Turquoise · Silver · Electric Blue
Traditional day: Saturday
Associated symbols: Amethyst · Violet

Interpretation label: “Lucky” associations are traditional correspondences. They do not change probability or predict outcomes.

Astrological interpretation

Career themes in sign guides

Popular astrology often connects Aquarius with the following fields. Career fit depends on a person's skills, interests, access, and circumstances—not a zodiac sign.

TechnologyScienceSocial activismAviationInvention

Frequently Asked Questions

What are the conventional Aquarius dates?▼

Aquarius is commonly assigned to January 20 - February 18 in the tropical zodiac. Boundary dates can vary by source, and a full natal chart uses year, time, and location.

Am I Aquarius or Capricorn if I was born on January 19?▼

It depends on the year. Aquarius begins the moment the Sun reaches its point on the ecliptic, and that moment shifts by up to about a day across the leap-year cycle, so January 19 falls in Capricorn in some years and Aquarius in others. A table cannot settle it; the birth year, and strictly the birth time and time zone, are needed.

Is there really a Capricorn–Aquarius cusp sign?▼

No. In astrological tradition the Sun occupies exactly one sign at any moment, so there is no thirteenth "cusp" sign. "Cusp" is popular shorthand for a birthday close to a boundary, where the published date alone is not decisive.

What are the Aquarius element and modality?▼

Aquarius is classified as a Air sign with a Fixed modality in Western astrological tradition.

Are Aquarius personality and compatibility readings scientific?▼

No. They are interpretations within astrology, not scientific measurements or reliable predictions about personality, relationships, career, or future events.