December 20 Zodiac Sign
Tradition: Western astrology. A tradition, not a forecast. Astrologers read it this way; the evidence does not.
By Suraj Giri
December 20 is Sagittarius on the dates most calendars use (November 22 to December 21). From 1950 to 2029, every birth hour on December 20 in US Eastern time fell in Sagittarius.
December 20 zodiac compatibility
By this site's zodiac points method, a December 20 Sagittarius scores highest with Aries and Leo, a strong match at 8 of 8 points, then Libra and Aquarius, a good match at 5 of 8.
| Pair | Verdict | Points | Aspect |
|---|---|---|---|
| Aries and Sagittarius | strong match | 8 of 8 | trine |
| Leo and Sagittarius | strong match | 8 of 8 | trine |
| Libra and Sagittarius | good match | 5 of 8 | sextile |
| Sagittarius and Aquarius | good match | 5 of 8 | sextile |
Have your partner's birthday? Compare December 20 with your partner's birthday.
Scores come from this site's zodiac points method (formula 1.1), reviewed by Jahben R., astrologer, on 2026-09-23. How it works is on the methodology page.
Sagittarius at a glance for a December 20 birthday
- Element: fire
- Modality: mutable
- Ruler: Jupiter
- Position: day 29 of 30 of Sagittarius
- Next sign: Capricorn, from December 22
- The Sun, 1950 to 2029 (US Eastern time): 27.5 to 29.9 degrees of Sagittarius
December 20 decan (Tradition)
In the triplicity system of decans, a tradition, December 20 falls in the third decan of Sagittarius (20 to 30 degrees), ruled by the Sun.
The older Chaldean system of decans assigns different rulers.
Famous people born on December 20
- Kylian Mbappé, footballer, born 1998
- Binali Yıldırım, politician, born 1955
- Martin Schulz, politician, born 1955
- Ashley Cole, football coach, born 1980
- Kim Young-sam, politician, born 1927
Birth dates from Wikidata (CC0), fetched 2026-09-26.
A note on December 20 birthdays
A third decan closes out Sagittarius near December 20, a stretch the triplicity system of decans keeps under the Sun, spanning 27.5 to 29.9 degrees on day 29 of Sagittarius' 30, a day short of Capricorn's start on December 22. Aries and Sagittarius trine for 8 points, a strong pairing, and Sagittarius meets Aquarius at 5, a good one, both under this site's own scale. Sagittarius favors a partner who gives it room and takes honesty well, the tradition reads, rather than one who prefers a fixed script.
Questions people ask
What zodiac sign is December 20?
Who is a December 20 Sagittarius most compatible with?
Does the birth year change the zodiac sign for December 20?
Birthdays around December 20
- December 19, Sagittarius
- December 21, Sagittarius or Capricorn
- All December birthdays
Sources
- astronomy-engine 2.1.19: the Sun's position; the methodology page records its check against NASA JPL Horizons, and the build checks it against published equinox and solstice times
- This site's zodiac points method: formula 1.1
- Wikidata (CC0): birth dates, fetched 2026-09-26