People born on December 21 are either Sagittarius (♐︎) or Capricorn (♑︎). In 52 of the 76 years from 1950 to 2025, the Sun moved into Capricorn during December 21: anyone born before that moment is a Sagittarius, and anyone born after is a Capricorn. In the other 24 years the Sun stayed in Sagittarius all day. Find your birth year below.
Where December 21 falls between Sagittarius and Capricorn
December 21 birthday: are you Sagittarius or Capricorn? Find your birth year
The Sun doesn't change signs at midnight. It crosses into Capricorn at a specific moment, the December solstice, and that moment moves about six hours later each year, then jumps back about 18 hours in each leap year. That's why two people born on December 21 can have different Sun signs. Find your birth year below. If you were born before the time shown, you're a Sagittarius; if you were born at or after it, you're a Capricorn.
1950s
(21:43 UTC)
(03:31, Dec 22 UTC)
(20:59 UTC)
(02:48, Dec 22 UTC)
1960s
(20:25 UTC)
(02:19, Dec 22 UTC)
(19:49 UTC)
(01:40, Dec 22 UTC)
(18:59 UTC)
(00:43, Dec 22 UTC)
1970s
(18:12 UTC)
(00:07, Dec 22 UTC)
(17:35 UTC)
(23:23 UTC)
1980s
(16:56 UTC)
(22:50 UTC)
(04:38, Dec 22 UTC)
(16:22 UTC)
(22:07 UTC)
(04:02, Dec 22 UTC)
(15:27 UTC)
(21:22 UTC)
1990s
(03:07, Dec 22 UTC)
(14:43 UTC)
(20:25 UTC)
(02:22, Dec 22 UTC)
(14:05 UTC)
(20:07 UTC)
(01:56, Dec 22 UTC)
2000s
(13:37 UTC)
(19:21 UTC)
(01:14, Dec 22 UTC)
(12:41 UTC)
(18:34 UTC)
(00:22, Dec 22 UTC)
(12:03 UTC)
(17:46 UTC)
2010s
(23:38 UTC)
(11:11 UTC)
(17:10 UTC)
(23:03 UTC)
(04:47, Dec 22 UTC)
(10:44 UTC)
(16:27 UTC)
(22:22 UTC)
(04:19, Dec 22 UTC)
2020s
(10:02 UTC)
(15:59 UTC)
(21:48 UTC)
(03:27, Dec 22 UTC)
(09:20 UTC)
(15:02 UTC)
Times are US Eastern Time. For Central time subtract 1 hour, for Mountain 2 and for Pacific 3. If you were born outside the US, use the UTC time shown in brackets and convert it to your local time. Calculated from astronomical ephemeris data.
December 21 personality: the Sagittarius–Capricorn cusp
Whichever side of the line you land on, a December 21 birthday falls on the solstice, the longest night of the year in the Northern Hemisphere and the moment the Sun leaves Jupiter's sign for Saturn's. Astrologers sometimes call this the Cusp of Prophecy, because people born here combine big vision with the patience to make it real. You can dream about moving abroad or starting a company, and then sit down and build the spreadsheet to get there.
Your Sagittarius side gives you optimism, humor and a restless need to explore. Your Capricorn side gives you ambition, discipline and a dry wit that catches people off guard. The tension shows up when life gets uncertain: the Archer wants to leap, the Sea-Goat wants a plan, and you can stall between the two. Your gift is that you rarely stay stuck for long. Once you decide, you commit with both fire and grit.
December 21 decans: last of Sagittarius, first of Capricorn
| If you're… | Decan | Birthdays | Co-ruler | Decan tarot card | Flavor |
|---|---|---|---|---|---|
| SagittariusBefore | 3rd | Dec 12 – Dec 21 | ☉ Sun | Ten of Wands | Warm, generous, carries big responsibilities |
| CapricornAfter | 1st | Dec 21/22 – Dec 31 | ♄ Saturn | Two of Pentacles | Pure Capricorn: disciplined, patient, ambitious |
December 21 zodiac in love
You want love that's fun now and solid later. The Sagittarius in you falls for laughter, spontaneity and a partner who'll say yes to a last-minute road trip. The Capricorn in you wants proof he's serious: consistency, follow-through and a shared idea of the future. You can be playful and flirty on the first date and quietly checking his long-term potential by the third. When someone passes both tests, you're loyal, protective and deeply committed.
Your biggest love lesson is letting your feelings show before you're certain. Both sides of your cusp can hide emotion, one behind jokes and the other behind composure, so a partner may not realize how much you care or how hurt you are. Say it plainly. When you feel safe, you're one of the most devoted partners in the zodiac.
Fun now, forever later? Ask the cards where this is heading, with a free AI tarot reading in under a minute.
December 21 compatibility: as a Sagittarius vs. as a Capricorn
| Sign | If you're Sagittarius | If you're Capricorn |
|---|---|---|
| ♌︎Leo | 93% | 59% |
| ♈︎Aries | 91% | 42% |
| ♎︎Libra | 88% | 46% |
| ♒︎Aquarius | 85% | 55% |
| ♐︎Sagittarius | 78% | 57% |
| ♊︎Gemini | 71% | 61% |
| ♋︎Cancer | 62% | 72% |
| ♉︎Taurus | 61% | 95% |
| ♑︎Capricorn | 57% | 75% |
| ♏︎Scorpio | 56% | 88% |
| ♓︎Pisces | 45% | 89% |
| ♍︎Virgo | 42% | 91% |
These scores are a general Sun-sign guide. Your Venus and Moon signs say more about who you click with.
December 21 zodiac sign: male and female traits
A December 21 man is funny, ambitious and harder to read than he seems. On the Sagittarius side, he shows interest with adventure: spontaneous plans, inside jokes and invitations to join his next trip. On the Capricorn side, he shows it through reliability: he follows through, plans ahead and treats you as part of his future. Either way, he guards his feelings, so a quiet week often means he's thinking, not losing interest.
A December 21 woman is bright, driven and quietly strong. Born on the solstice, with The Empress as her number, she combines Sagittarian warmth with Capricorn's determination and a real gift for making a home feel full of life. She loves loyally once she's sure. She won't tolerate inconsistency, empty promises or a partner who doesn't take her ambitions seriously.
Your December 21 birthday tarot cards
In classical tarot astrology every sign has a Major Arcana card, and every ten-day decan has a Minor Arcana card from the Golden Dawn system. A December 21 birthday sits on the line between two of each:
Put the two decan cards side by side and you have the December 21 story. The Ten of Wands is a figure hauling a heavy bundle of staffs on the last stretch home, the end of a long Sagittarian journey. The Two of Pentacles is a figure lightly juggling two coins while ships ride the waves behind them, the first lesson of Capricorn season. Your growth lies between them: setting down what's too heavy so you can juggle what matters with ease.
December 21 numerology
Three is the number of creativity, joy and self-expression, and its card is The Empress, a figure of abundance and warmth. Three is also Jupiter's number, a nod to your Sagittarius side. Before it's reduced, 21 is the number of The World (XXI), the card of completion and Saturn's card in tarot astrology, a nod to your Capricorn side. Together they describe someone who finishes one big chapter and starts the next with real creative energy.
December 21 birthstone, colors and lucky symbols
| Birthstone | Turquoise (December): protection, calm and good fortune |
| Crystals | Turquoise and amethyst (Sagittarius) · Garnet and onyx (Capricorn) |
| Birth flower | Narcissus and holly |
| Lucky colors | Purple and royal blue (Sagittarius) · Brown, charcoal and dark green (Capricorn) |
| Lucky day | Thursday (Jupiter) · Saturday (Saturn) |
| Lucky numbers | 3, 8, 21 |
| Metal | Tin (Sagittarius) · Lead (Capricorn) |
December 21 Moon sign and rising sign
Your Sun sign (Sagittarius or Capricorn) comes from your birthday. Your Moon sign and rising sign don't. The Moon changes sign every two to three days, and your rising sign changes roughly every two hours, so working them out needs your birth year, exact birth time and birthplace. That's why two people born on December 21 can feel so different. Your Moon sign shapes your emotional needs and what comforts you; your rising sign shapes your first impression and personal style. For cusp birthdays the Moon sign is especially useful, because it often explains which side of the cusp you relate to more.
December 21 zodiac animal: Western symbol and Chinese zodiac
In Western astrology, Sagittarius's symbol is the Archer, a centaur aiming its arrow at the horizon, and Capricorn's is the Sea-Goat, a goat with a fish's tail that climbs mountains and swims the depths. Which one is yours depends on your birth year and time (see the table above). Your Chinese zodiac animal depends on your birth year, not your birthday. This date always falls after Lunar New Year, so your animal is simply your birth year's animal. Find your birth year below.
Career and money
You're at your best where vision meets execution. Entrepreneurship, law, publishing, travel and hospitality management, finance, film production and leadership roles all suit you, because Sagittarius brings the big idea and Capricorn brings the structure to deliver it. You're the colleague who pitches the bold plan and then quietly builds the timeline that makes it work. Watch for overworking during the holidays, and for treating rest as something you have to earn.
Famous people born on December 21
On this day: December 21 in history
Explore nearby birthdays
See every December birthday in the December zodiac sign guide, or browse all zodiac signs.
December 21 zodiac FAQ
What zodiac sign is December 21?
December 21 is Sagittarius or Capricorn, depending on your birth year and time. From 1950 to 2025, the Sun entered Capricorn during December 21 in 52 years and stayed in Sagittarius all day in the other 24. Check the birth-year table on this page for your exact sign.
I was born on December 21. How do I know if I'm Sagittarius or Capricorn?
Find your birth year in the table above. If you were born before the time listed, you're a Sagittarius. If you were born at or after it, you're a Capricorn. If your year shows "Sagittarius all day", you're a Sagittarius whatever time you were born.
What is the Sagittarius–Capricorn cusp?
It's the few days around December 18–24 when the Sun moves from Sagittarius into Capricorn, at the December solstice. It's sometimes called the Cusp of Prophecy. Astrologically you still have one Sun sign, but many cusp-born people relate to traits of both.
What decan is December 21?
If you're a Sagittarius, you're in Sagittarius's third decan (Dec 12–21), co-ruled by the Sun. If you're a Capricorn, you're in Capricorn's first decan, ruled by Saturn.
What is the birthstone for December 21?
Turquoise is the December birthstone. Turquoise and amethyst suit the Sagittarius side, and garnet or onyx suits the Capricorn side.
What tarot cards represent December 21?
Temperance (Sagittarius) and The Devil (Capricorn) are the sign cards. The decan cards are the Ten of Wands for late Sagittarius and the Two of Pentacles for early Capricorn.
What element is December 21?
It depends on which side of the cusp you fall. Sagittarius is a Fire sign and Capricorn is an Earth sign, so check your birth year in the table above.
What is the zodiac animal for December 21?
Sagittarius's symbol is the Archer and Capricorn's is the Sea-Goat. Your Chinese zodiac animal depends on your birth year: for example, 1990 is the Horse, 1996 the Rat and 2000 the Dragon.
What are the Moon sign and rising sign for December 21?
They can't be worked out from the date alone. The Moon changes sign every two to three days and the rising sign about every two hours, so you need your birth year, time and place.
What is a December 21 man like?
Funny, ambitious and hard to read. On the Sagittarius side he shows interest with adventure, and on the Capricorn side with reliability and long-term plans.
What is a December 21 woman like?
Bright, driven and quietly strong. She loves loyally and needs a partner who is consistent and takes her goals seriously.
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