What zodiac sign are people born in December?
People born in December fall under 2 zodiac signs in astrological tradition: Sagittarius and Capricorn. Sagittarius covers December 1–21, and Capricorn covers December 22–31. Astrologers associate Sagittarius with the fire element and Capricorn with the earth element, giving December a mix of quick, restless energy and steady, practical focus.
Sagittarius: birthdays from December 1 to December 21
People born from December 1 to December 21 have the Sun in Sagittarius in most birth charts. Astrologers describe Sagittarius as curious, direct, and drawn to big ideas or wide horizons. In conversations, Sagittarius people often jump quickly to the main point or change topics fast when bored.
In group work, Sagittarius people tend to throw out bold suggestions and prefer freedom over strict rules. Astrologers link Sagittarius with the fire element, so this sign is often associated with enthusiasm that can inspire others but also lead to impatience.
December 1 belongs to the Sagittarius I decan, often linked with a classic and straightforward form of the sign’s style. People born from December 2–11 fall under the Sagittarius II decan. Those born from December 12–21 are in the Sagittarius III decan, often tied to a more independent and outspoken expression of Sagittarius traits.
Capricorn: birthdays from December 22 to December 31
People born from December 22 to December 31 have the Sun in Capricorn in most birth charts. Astrologers describe Capricorn as realistic and focused on long-term goals. In everyday decisions, Capricorn people often think about consequences and timing before agreeing to anything.
In group situations, Capricorn people may naturally take on planning tasks or suggest clear roles. Astrologers link Capricorn with the earth element, so this sign is associated with steadiness and persistence, which can be helpful but may also come across as cautious. All December Capricorn birthdays, from December 22–31, belong to the Capricorn I decan.
Astrological tradition connects the Capricorn I decan with patient effort and a practical style of ambition. In a disagreement, Capricorn people from this decan might keep emotions low and argue from facts and responsibilities.
The zodiac cusp in December
Astrologers call the shift from Sagittarius to Capricorn in December a cusp, but it is a clear boundary in the sky, not a blended sign. Between 1930 and 2030, in US Eastern Time, the Sun entered Capricorn on December 21 in some years and on December 22 in others. Because of this, some people born on December 21 are Sagittarius while a smaller part are Capricorn, and the same applies in reverse for December 22.
Each day page for late Sagittarius and early Capricorn birthdays includes a tool that checks a specific year and time to show which sign the Sun occupied at a given birth moment. This helps people born near the December cusp see whether their chart is Sagittarius or Capricorn according to astrological tradition.