Sun in Capricorn
Sun in Capricorn means you treat time as a building material. You think in years, you'd rather do a thing slowly and have it last, and you take a quiet pleasure in anything that's still standing a decade later because you put it there.
The Sun is in Capricorn from about December 22 to January 19, starting at the December solstice. It's the one sign that spans the new year, so a December 31 baby and a January 1 baby share it. The end dates shift by a day with the year, so if you were born on an edge, check with the sun sign calculator.
Dry, not cold
Capricorn is cardinal earth, ruled by Saturn, and gets labeled cold and ambitious. Spend an evening with one and the first thing you notice is the humor: bone dry, delivered without a smile, and funnier the second time you think about it.
The cardinal part means you start things, specifically structures. You set up the shared spreadsheet, write the rules for the group trip, put the first money into the savings account at nineteen. Affection comes out as competence. You show up early, you remember the deadline nobody else wrote down, and you'd rather fix the leaky faucet than talk about how much you care.
Joy, postponed
The honest tension is in the word later. You'll enjoy it once the promotion comes, once the debt is paid, once the house is in order. Then the conditions move, because there's always another one. Years go by with the good part scheduled but not started.
There's a second cost. Being relied on starts to feel like being loved, and the two aren't the same. Capricorn suns who are easiest to be close to have learned to let people help them, which is harder for you than any amount of work.
How your Moon and rising soften it
The Sun is the long-term core; your Moon and rising sign decide how much of the Saturn shows. A Capricorn sun with a Cancer Moon is soft at home and formidable at work, and the two sets of people who know you would describe different people. With a Sagittarius or Leo Moon, the ambition is warmer and louder, and you enjoy the climb as much as the summit.
If your Moon is in Capricorn too, you calm down by being in control of something: see Moon in Capricorn. Capricorn rising gives a composed, serious first impression. In the Northern Hemisphere Capricorn rises quickly, so it's one of the less common rising signs there, and a double Capricorn was born near sunrise in the depths of a northern winter.
Questions
Are Capricorn suns cold?
No, they're private and practical. The warmth is there, but it comes out as reliability and dry jokes, not big declarations.
Is Capricorn compatible with Cancer?
They're opposite signs, both cardinal. Capricorn builds the structure and Cancer fills it with people, and the match works when Capricorn makes room for feeling and Cancer respects the plan.
I was born on January 20. Am I a Capricorn or an Aquarius?
It depends on the year and time. In some years the Sun is still in Capricorn on January 20, in others it has moved on, so put your full birth details into the calculator.