Born on December 21

December 21 zodiac sign

If you were born on December 21, your Sun sign is Sagittarius or Capricorn. This is a cusp day, when the Sun crosses from one sign into the next at a different hour each year.

The archer, aiming past the darkest days toward the light.

FireMutableJupiter

On December 21 the Sun is crossing the last degree of Sagittarius into the first degree of Capricorn.

In 10% of years the Sun had already reached Capricorn by midday on December 21 in Greenwich. Your exact birth year, time and place decide which side you were born on.

Find your exact Sun degree

Add your birth year, and your time and place if you know them. Hali will work out exactly where the Sun stood when you arrived, and when it next returns there.

Your birthday star

Kaus Australis

Kaus Australis gets its yearly visit from the Sun on December 27, 6 days after your birthday. The bow of the Archer, drawn back toward the heart of our galaxy. A star of aim and focus, for people who know exactly what they want.

Kaus Australis sits at 5° Capricorn.

The stars truly behind your Sun

On December 21 the Sun stands in front of the stars of Sagittarius, the archer, the constellation that gave Sagittarius its name.

See the real sky behind your whole chart

December 21 in every year from 1940 to 2025

The Moon, Mercury and Venus keep moving too. Open your decade to see where they were on your birthday. Times are Greenwich time (UTC), so if the Moon changed sign that day, your birth time and place decide which side of the line you were born on.

The 1940s

Year	Moon	Mercury	Venus
1940	Virgo	Sagittarius	Sagittarius
1941	Aquarius	Sagittarius	Aquarius
1942	Gemini	Capricorn	Capricorn
1943	Libra	Capricorn	Scorpio
1944	Pisces	Capricorn, retrograde	Aquarius
1945	Cancer, then Leo from 09:31	Sagittarius	Sagittarius
1946	Sagittarius	Sagittarius	Scorpio
1947	Aries	Sagittarius	Capricorn
1948	Leo, then Virgo from 00:19	Capricorn	Sagittarius
1949	Capricorn	Capricorn	Aquarius

The 1950s

Year	Moon	Mercury	Venus
1950	Taurus, then Gemini from 17:50	Capricorn	Capricorn
1951	Virgo, then Libra from 16:41	Sagittarius, retrograde	Scorpio
1952	Aquarius, then Pisces from 13:46	Sagittarius	Aquarius
1953	Cancer	Sagittarius	Sagittarius
1954	Scorpio	Sagittarius	Scorpio
1955	Pisces	Capricorn	Capricorn
1956	Leo	Capricorn	Sagittarius
1957	Sagittarius, then Capricorn from 07:47	Capricorn, retrograde	Aquarius
1958	Taurus	Sagittarius	Capricorn
1959	Virgo	Sagittarius	Scorpio

The 1960s

Year	Moon	Mercury	Venus
1960	Aquarius	Sagittarius	Aquarius
1961	Gemini	Capricorn	Sagittarius
1962	Libra, then Scorpio from 18:18	Capricorn	Scorpio
1963	Aquarius, then Pisces from 11:29	Capricorn	Capricorn
1964	Cancer, then Leo from 06:31	Sagittarius, retrograde	Sagittarius
1965	Sagittarius	Sagittarius	Aquarius
1966	Aries	Sagittarius	Capricorn
1967	Leo	Sagittarius	Scorpio
1968	Capricorn, then Aquarius from 21:00	Capricorn	Aquarius
1969	Taurus, then Gemini from 03:28	Capricorn	Sagittarius

The 1970s

Year	Moon	Mercury	Venus
1970	Virgo, then Libra from 00:02	Capricorn, retrograde	Scorpio
1971	Aquarius	Sagittarius, retrograde	Capricorn
1972	Cancer	Sagittarius	Sagittarius
1973	Scorpio, then Sagittarius from 21:20	Sagittarius	Aquarius
1974	Pisces, then Aries from 20:36	Capricorn	Capricorn
1975	Cancer, then Leo from 02:54	Capricorn	Scorpio
1976	Sagittarius, then Capricorn from 03:12	Capricorn	Aquarius
1977	Taurus	Sagittarius, retrograde	Sagittarius
1978	Virgo	Sagittarius	Scorpio
1979	Capricorn, then Aquarius from 17:13	Sagittarius	Capricorn

The 1980s

Year	Moon	Mercury	Venus
1980	Gemini, then Cancer from 18:03	Sagittarius	Sagittarius
1981	Scorpio	Capricorn	Aquarius
1982	Aquarius, then Pisces from 00:56	Capricorn	Capricorn
1983	Cancer	Capricorn	Scorpio
1984	Sagittarius	Sagittarius, retrograde	Aquarius
1985	Aries, then Taurus from 19:41	Sagittarius	Sagittarius
1986	Leo, then Virgo from 19:31	Sagittarius	Scorpio
1987	Capricorn	Sagittarius	Capricorn
1988	Gemini	Capricorn	Sagittarius
1989	Libra	Capricorn	Aquarius

The 1990s

Year	Moon	Mercury	Venus
1990	Aquarius	Capricorn, retrograde	Capricorn
1991	Gemini, then Cancer from 11:55	Sagittarius	Scorpio
1992	Scorpio, then Sagittarius from 12:43	Sagittarius	Aquarius
1993	Pisces, then Aries from 00:19	Sagittarius	Sagittarius
1994	Leo	Capricorn	Scorpio
1995	Sagittarius	Capricorn	Capricorn
1996	Taurus	Capricorn	Sagittarius
1997	Virgo, then Libra from 21:35	Sagittarius, retrograde	Aquarius
1998	Capricorn, then Aquarius from 14:17	Sagittarius	Capricorn
1999	Gemini	Sagittarius	Scorpio

The 2000s

Year	Moon	Mercury	Venus
2000	Scorpio	Sagittarius	Aquarius
2001	Pisces	Capricorn	Sagittarius
2002	Cancer	Capricorn	Scorpio
2003	Scorpio, then Sagittarius from 08:16	Capricorn, retrograde	Aquarius
2004	Aries, then Taurus from 05:53	Sagittarius	Sagittarius
2005	Leo, then Virgo from 02:39	Sagittarius	Aquarius
2006	Capricorn	Sagittarius	Capricorn
2007	Taurus, then Gemini from 22:15	Capricorn	Scorpio
2008	Libra, then Scorpio from 23:37	Capricorn	Aquarius
2009	Aquarius, then Pisces from 23:43	Capricorn	Sagittarius

The 2010s

Year	Moon	Mercury	Venus
2010	Gemini, then Cancer from 09:23	Sagittarius, retrograde	Scorpio
2011	Scorpio	Sagittarius	Aquarius
2012	Aries	Sagittarius	Sagittarius
2013	Leo	Sagittarius	Capricorn
2014	Sagittarius	Capricorn	Capricorn
2015	Aries, then Taurus from 00:13	Capricorn	Scorpio
2016	Virgo, then Libra from 02:40	Capricorn, retrograde	Aquarius
2017	Capricorn, then Aquarius from 02:30	Sagittarius, retrograde	Sagittarius
2018	Gemini	Sagittarius	Scorpio
2019	Libra, then Scorpio from 12:58	Sagittarius	Aquarius

The 2020s

Year	Moon	Mercury	Venus
2020	Pisces, then Aries from 22:33	Capricorn	Sagittarius
2021	Cancer, then Leo from 21:54	Capricorn	Capricorn
2022	Scorpio, then Sagittarius from 07:13	Capricorn	Capricorn
2023	Aries	Capricorn, retrograde	Scorpio
2024	Virgo	Sagittarius	Aquarius
2025	Capricorn	Sagittarius	Sagittarius

Moon at midnight and the minute it changed sign, Mercury and Venus at noon, all Greenwich time. Your exact placements need your birth time and place. Find your exact Moon sign

Eclipses on December 21

Between 1930 and 2050, these eclipses fell on December 21, Greenwich time.

1991, partial lunar eclipse at 10:33
2010, total lunar eclipse at 08:16

How common is a December 21 birthday?

In US birth records from 1994 to 2014, an average of 11,680 babies were born on December 21 each year. That makes it number 55 of 366 birthdays, where 1 is the most common. That is 5% more than an average day.

See every birthday and sign ranked

The Sagittarius in you

Your gift

Faith in life, even when life is hard.

Your growing edge

Staying. The next horizon always calls, and sometimes the treasure is right where you are.

Your decan, the third part of Sagittarius

Ruled by the Sun

The Sun adds warmth and showmanship. You are a born storyteller and teacher, and your joy lights up a room.

Read about the third decan of Sagittarius

Born after the Sun crossed into Capricorn? Your story belongs to Capricorn. Read your Capricorn birthday

When the Sun changed sign, year by year

Every year the Sun crossed from Sagittarius into Capricorn around December 21. Times are Greenwich time (UTC), so add or subtract your birthplace's offset. Find your year to see which side you were born on.

1932Dec 22, 01:14

1933Dec 22, 06:57

1936Dec 22, 00:26

1937Dec 22, 06:21

1940Dec 21, 23:54

1941Dec 22, 05:44

1942Dec 22, 11:39

1944Dec 21, 23:15

1945Dec 22, 05:03

1946Dec 22, 10:53

1948Dec 21, 22:33

1949Dec 22, 04:23

1950Dec 22, 10:13

1952Dec 21, 21:43

1953Dec 22, 03:31

1954Dec 22, 09:24

1956Dec 21, 20:59

1957Dec 22, 02:49

1958Dec 22, 08:39

1960Dec 21, 20:26

1961Dec 22, 02:19

1962Dec 22, 08:14

1964Dec 21, 19:49

1965Dec 22, 01:40

1966Dec 22, 07:28

1968Dec 21, 19:00

1969Dec 22, 00:43

1970Dec 22, 06:35

1972Dec 21, 18:13

1973Dec 22, 00:08

1974Dec 22, 05:55

1975Dec 22, 11:45

1976Dec 21, 17:35

1977Dec 21, 23:22

1978Dec 22, 05:20

1979Dec 22, 11:09

1980Dec 21, 16:56

1981Dec 21, 22:50

1982Dec 22, 04:37

1983Dec 22, 10:30

1984Dec 21, 16:23

1985Dec 21, 22:08

1986Dec 22, 04:01

1987Dec 22, 09:46

1988Dec 21, 15:28

1989Dec 21, 21:22

1990Dec 22, 03:06

1991Dec 22, 08:53

1992Dec 21, 14:43

1993Dec 21, 20:26

1994Dec 22, 02:22

1995Dec 22, 08:17

1996Dec 21, 14:06

1997Dec 21, 20:07

1998Dec 22, 01:56

1999Dec 22, 07:44

2000Dec 21, 13:37

2001Dec 21, 19:21

2002Dec 22, 01:14

2003Dec 22, 07:03

2004Dec 21, 12:41

2005Dec 21, 18:35

2006Dec 22, 00:21

2007Dec 22, 06:07

2008Dec 21, 12:03

2009Dec 21, 17:46

2010Dec 21, 23:38

2011Dec 22, 05:30

2012Dec 21, 11:11

2013Dec 21, 17:11

2014Dec 21, 23:02

2015Dec 22, 04:48

2016Dec 21, 10:44

2017Dec 21, 16:28

2018Dec 21, 22:22

2019Dec 22, 04:19

2020Dec 21, 10:02

2021Dec 21, 15:59

2022Dec 21, 21:47

2023Dec 22, 03:27

2024Dec 21, 09:20

2025Dec 21, 15:03

2026Dec 21, 20:50

2027Dec 22, 02:42

2028Dec 21, 08:20

2029Dec 21, 14:14

2030Dec 21, 20:09

2031Dec 22, 01:55

2032Dec 21, 07:56

2033Dec 21, 13:45

2034Dec 21, 19:34

2035Dec 22, 01:30

2036Dec 21, 07:12

2037Dec 21, 13:07

2038Dec 21, 19:02

2039Dec 22, 00:40

2040Dec 21, 06:32

2041Dec 21, 12:18

2042Dec 21, 18:04

2043Dec 22, 00:01

2044Dec 21, 05:43

2045Dec 21, 11:35

2046Dec 21, 17:28

2047Dec 21, 23:07

2048Dec 21, 05:01

2049Dec 21, 10:52

2050Dec 21, 16:38

Questions about December 21

What zodiac sign is December 21?

If you were born on December 21, your Sun sign is Sagittarius or Capricorn. This is a cusp day, when the Sun crosses from one sign into the next at a different hour each year.

Is December 21 a cusp birthday?

Yes. The Sun moves from Sagittarius into Capricorn around this day, at a different hour each year, so people born on December 21 can be either sign. Check your birth year above to see which you are.

What is the birthday star for December 21?

What was the Moon sign on December 21?

It depends on the year, because the Moon changes sign about every two and a half days. On December 21 2025 the Moon was in Capricorn, and on December 21 2024 it was in Virgo. Find your year in the table above, and add your birth time for the exact sign.

What constellation is the Sun in on December 21?