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January 21 Zodiac Sign

People born on January 21 are Capricorn or Aquarius, depending on the year and the time of birth.

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Find your exact sign

January 21 by the numbers

At 12:00 UTC, January 21 falls in Aquarius in 100% of 15 recorded years and Capricorn in 0%.

The ingress ranged from 00:17 UTC in 1931 to 08:04 UTC in 1920.

When the ingress is into Aries, Cancer, Libra, or Capricorn, it marks the March equinox, June solstice, September equinox, or December solstice respectively. Ingresses into the other eight signs mark the start of mid season periods.

How to read a January 21 Sun sign

A Sun sign is the sign the Sun occupied at your birth instant. Near an ingress, that instant can fall on either side of the boundary, so people born on January 21 may have different signs in different years.

Enter the birth year, local clock time, and a named time zone such as America/Los_Angeles. The named zone accounts for daylight saving rules on the birth date.

This lookup uses the tropical zodiac and identifies only the Sun sign. Use the chart step for other placements.

When the Sun changed signs on January 21

The ingress date and time are listed in UTC. Before the listed time the Sun was in Capricorn; at and after it the Sun was in Aquarius.

YearUTC timeBeforeAfter
193605:12Z UTCCapricornAquarius
194004:44Z UTCCapricornAquarius
194404:07Z UTCCapricornAquarius
194803:18Z UTCCapricornAquarius
195202:38Z UTCCapricornAquarius
195601:48Z UTCCapricornAquarius
196001:10Z UTCCapricornAquarius
196400:41Z UTCCapricornAquarius
Full ingress history, 1920–2030 (15 dates)
YearUTC timeBeforeAfter
192008:04Z UTCCapricornAquarius
192301:35Z UTCCapricornAquarius
192407:28Z UTCCapricornAquarius
192701:12Z UTCCapricornAquarius
192806:57Z UTCCapricornAquarius
193100:17Z UTCCapricornAquarius
193206:07Z UTCCapricornAquarius
193605:12Z UTCCapricornAquarius
194004:44Z UTCCapricornAquarius
194404:07Z UTCCapricornAquarius
194803:18Z UTCCapricornAquarius
195202:38Z UTCCapricornAquarius
195601:48Z UTCCapricornAquarius
196001:10Z UTCCapricornAquarius
196400:41Z UTCCapricornAquarius

What Capricorn and Aquarius birthdays are like

Capricorn

Capricorn energy builds confidence through patience, responsibility, and work that can stand the test of time. It brings ambition with substance and a quietly impressive staying power. As a cardinal earth sign ruled by Saturn, Capricorn favors giving a long term goal structure; picture a stone stair built one careful step at a time.

Aquarius

Aquarius energy makes room for the idea nobody has tried yet. It brings originality, independence, and an instinct for finding the people and possibilities ahead of their time. As a fixed air sign ruled by Saturn, Aquarius favors holding an independent perspective; picture a new blueprint shared with the whole group.

Astrology is a symbolic framework, not a scientific personality test or a guarantee about any individual.

Also born around January 21

These birthdays fall within two calendar days before or after January 21; they are not exact date matches.

Frequently asked questions

What zodiac sign is January 21?

People born on January 21 may be Capricorn or Aquarius. The Sun changes signs on this calendar date in different years, so the birth year, time, and time zone determine the exact sign.

Is January 21 Capricorn or Aquarius?

It can be either Capricorn or Aquarius. Check the ingress time for your birth year and convert your birth time to UTC to find the exact Sun sign.

How do I find my exact Sun sign if I was born on January 21?

Enter your birth year, local birth time, and time zone in the exact sign finder. It compares that UTC birth instant with the Sun sign ingress.

All january dates

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Updated October 2026

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