Skip to content

December 21 Zodiac Sign

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

See your full birth chart in the Timing app

Find your exact sign

December 21 by the numbers

At 12:00 UTC, December 21 falls in Capricorn in 12% of 43 recorded years and Sagittarius in 88%.

The ingress ranged from 08:20 UTC in 2028 to 23:55 UTC in 1940.

The next listed ingress is Capricorn in 2026, at 20:50 UTC on December 21.

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 December 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 December 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 December 21

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

YearUTC timeBeforeAfter
202115:59Z UTCSagittariusCapricorn
202221:48Z UTCSagittariusCapricorn
202409:21Z UTCSagittariusCapricorn
202515:03Z UTCSagittariusCapricorn
202620:50Z UTCSagittariusCapricorn
202808:20Z UTCSagittariusCapricorn
202914:14Z UTCSagittariusCapricorn
203020:10Z UTCSagittariusCapricorn
Full ingress history, 1920–2030 (43 dates)
YearUTC timeBeforeAfter
194023:55Z UTCSagittariusCapricorn
194423:15Z UTCSagittariusCapricorn
194822:33Z UTCSagittariusCapricorn
195221:43Z UTCSagittariusCapricorn
195620:59Z UTCSagittariusCapricorn
196020:26Z UTCSagittariusCapricorn
196419:50Z UTCSagittariusCapricorn
196819:00Z UTCSagittariusCapricorn
197218:13Z UTCSagittariusCapricorn
197617:35Z UTCSagittariusCapricorn
197723:23Z UTCSagittariusCapricorn
198016:56Z UTCSagittariusCapricorn
198122:51Z UTCSagittariusCapricorn
198416:23Z UTCSagittariusCapricorn
198522:08Z UTCSagittariusCapricorn
198815:28Z UTCSagittariusCapricorn
198921:22Z UTCSagittariusCapricorn
199214:43Z UTCSagittariusCapricorn
199320:26Z UTCSagittariusCapricorn
199614:06Z UTCSagittariusCapricorn
199720:07Z UTCSagittariusCapricorn
200013:37Z UTCSagittariusCapricorn
200119:21Z UTCSagittariusCapricorn
200412:42Z UTCSagittariusCapricorn
200518:35Z UTCSagittariusCapricorn
200812:04Z UTCSagittariusCapricorn
200917:47Z UTCSagittariusCapricorn
201023:38Z UTCSagittariusCapricorn
201211:12Z UTCSagittariusCapricorn
201317:11Z UTCSagittariusCapricorn
201423:03Z UTCSagittariusCapricorn
201610:44Z UTCSagittariusCapricorn
201716:28Z UTCSagittariusCapricorn
201822:23Z UTCSagittariusCapricorn
202010:02Z UTCSagittariusCapricorn
202115:59Z UTCSagittariusCapricorn
202221:48Z UTCSagittariusCapricorn
202409:21Z UTCSagittariusCapricorn
202515:03Z UTCSagittariusCapricorn
202620:50Z UTCSagittariusCapricorn
202808:20Z UTCSagittariusCapricorn
202914:14Z UTCSagittariusCapricorn
203020:10Z UTCSagittariusCapricorn

What Sagittarius and Capricorn birthdays are like

Sagittarius

Sagittarius energy grows through discovery, meaning, and the feeling that life is still capable of surprise. It brings optimism, candour, and a love of what lies beyond the familiar. As a mutable fire sign ruled by Jupiter, Sagittarius favors testing ideas through experience; picture a trail continuing beyond the familiar map.

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.

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

Also born around December 21

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

Frequently asked questions

What zodiac sign is December 21?

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

Is December 21 Sagittarius or Capricorn?

It can be either Sagittarius or Capricorn. 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 December 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 december dates

12345678910111213141516171819202122232425262728293031

Updated October 2026

See your full birth chart in the Timing app