Born on December 21
A December 21 birthday is Sagittarius or Capricorn.
The Sun moves from Sagittarius into Capricorn on or around December 21, so your birth year, time and place decide your sign. Most December 21 births are Sagittarius. Add your birth details below and Danu checks it from your exact birth moment.
Your chart
Sagittarius or Capricorn? Check your Sun.
Enter your birth details. Danu computes your Sun's exact position from your birth moment.
The sky on your birthday
The Sun on December 21
- Sun position
- 27° Sagittarius to 1° Capricorn
- Every position a December 21 birth can have, 1925 to 2025, any time zone.
- Sign change
- Sagittarius to Capricorn
- Usually Sagittarius on this date. An exact birth time settles it.
- Day of the year
- 355
- Day 356 in a leap year.
Your Sun
What Sagittarius and Capricorn carry
Sun in Sagittarius or Sun in Capricorn
The Sun is your center of gravity — the thing you keep returning to. Read what Sagittarius or Capricorn actually means, then go past it: your chart has a Moon, a rising sign, and a live sky moving over it right now.
Good company
Famous December 21 birthdays
People who share your birthday — and, for the ones with a verified birth time, a full natal chart you can read.
Nearby
Birthdays either side
Common questions
December 21 birthdays, answered
What zodiac sign is December 21?
Sagittarius or Capricorn. The Sun changes sign on or around December 21, so it depends on the birth year, time and place. Most December 21 births are Sagittarius. An exact birth time settles it.
Is a December 21 birthday a Sagittarius–Capricorn cusp?
Yes, in the popular sense: the Sun changes sign on or around this date. Astrologically the Sun is always in one sign or the other, never a blend. Compute your chart with your exact birth time to see which.
What famous people were born on December 21?
Phil Donahue (1935), Jane Fonda (1937) and Emmanuel Macron (1977).
What day of the year is December 21?
Day 355, or day 356 in a leap year.
Your turn
Your Sun sign is the trailer
See your whole chart — Moon, rising, and what the sky is doing over it today.