The short version
If your birthday falls between January 20 and February 18, you are a Aquarius: independent, original, intellectual, and unconventional, the zodiac's visionary who thinks for itself. Those are the Aquarius dates in most years, but the exact start and end move by a day or so as the Sun shifts, so the edges are worth a closer look.
Why Aquarius dates shift by a day each year
The Sun does not cross into Aquarius at the same minute every year. It enters around January 20 and leaves around February 18, but the precise moment drifts by roughly a day depending on the year and your time zone. That is why two reputable sources can list slightly different Aquarius dates, and why anyone born right at the edge needs their exact birth chart, not a generic date list, to be sure.
Born on the Aquarius cusp?
If you were born at the very start of Aquarius, around January 20, you may be on the Capricorn-Aquarius cusp: see January 19, January 20. If you were born at the very end, around February 18, you may be on the Aquarius-Pisces cusp: see February 18. On a cusp, only your full birth chart can settle which sign your Sun is actually in.
The three types of Aquarius: decans
Not every Aquarius is alike. The sign splits into three ten-day decans, each with its own flavor: Aquarius decan 1 (January 20 to 29), Aquarius decan 2 (January 30 to February 8), Aquarius decan 3 (February 9 to 18). Your decan sharpens the basic Aquarius picture depending on which third of the sign you were born in.
Aquarius at a glance
Aquarius (♒) is a fixed air sign ruled by Saturn and Uranus. Its opposite sign is Leo, and it sits between Capricorn and Pisces in the zodiac wheel. As a fixed air sign, Aquarius is independent at its core.
Are you sure you are a Aquarius?
Your Sun sign is the baseline, but it is only the Sun, one of about ten major chart factors. Your Moon, rising sign, and planets depend on your exact date, time, and city, and near a cusp they can even shift your sun sign itself. Calculate your free birth chart to confirm your real placements, then start your 7-day free trial for a personal reading on your WhatsApp each morning.
Frequently Asked Questions
What are the dates for Aquarius?
Aquarius dates run from about January 20 to February 18. The exact boundaries shift by a day or so each year as the Sun moves, so a birthday right at the edge is best confirmed with a full birth chart.
Is someone born on January 20 a Aquarius?
Usually yes, January 20 is right at the start of Aquarius, on the Capricorn-Aquarius cusp. In some years the Sun crosses a little earlier or later, so a birth on that exact date is best checked against a real chart rather than a generic date list.
What if I was born on the Aquarius cusp?
If you were born near January 20 or February 18, you are on a Aquarius cusp and could be either sign depending on the year and your birth time. Only your full birth chart, built from your exact date, time, and city, can tell you for certain which sign your Sun is in.
Why do Aquarius dates change each year?
Because the calendar and the Sun's path do not line up perfectly. The Sun enters Aquarius at a slightly different moment each year, so the start and end dates drift by about a day. The date ranges you see are the typical ones, accurate for most years.
Curious about the energy of this time of year? See Aquarius season, what it means for every sign.