Birthday signs · Sagittarius season
What zodiac sign is December 12?
The tropical zodiac places December 12 in Sagittarius. Across the 101 years from 1930 through 2030, the Sun was in Sagittarius at noon UTC on December 12, at 19.5° to 20.99° Sagittarius. Day 20 or 21 of Sagittarius season, in its late part, is December 12, and its element is fire.
Calculated across 1930–2030 · checked .
December 12 is Sagittarius
| Sagittarius at noon UTC | 101 of 101 years, 1930–2030 |
|---|---|
| Nearest change of sign | at least 8 days away |
| Birth time needed for the sign | no |
December 12 at a glance
| Sign | ♐︎ Sagittarius, the Archer |
|---|---|
| Element and mode | fire, mutable |
| Polarity | positive (masculine) |
| Ruler | Jupiter (traditional) |
| Sun on this date | 19.5° to 21° Sagittarius at noon UTC, 1930–2030 |
| Day of the season | day 20 or 21 of Sagittarius season |
| Decan | second (26 years) and third (75); faces: the Moon, Saturn |
| Sidereal sign (Lahiri) | Scorpio |
| Day number | 3 (modern numerology) |
Rulers: Ptolemy; modern list.6
The decan: late Sagittarius
| Noon Sun | 19.5° to 20.99° Sagittarius |
|---|---|
| Decans | second in 26 years, third in 75 |
| Decan line crossed | 20° |
| Face rulers, Chaldean order | the Moon, Saturn |
Faces after Lilly, in Chaldean order.3
December 12 by the numbers
| Day number | 3 (1 + 2 = 3) |
|---|---|
| Month-day number | 6 (3 + 3) |
| System | modern numerology, digit sums |
Digit sums as numerology guides give them.4
Where the date falls in the season
| Day of Sagittarius season | 20 or 21 |
|---|---|
| Sagittarius season opened | November 22 (48 years) or November 23 (53) |
| Sagittarius season closed | December 20 (5 years) or December 21 (82) or December 22 (14) |
| Element and mode | fire, mutable |
| Traditional ruler | Jupiter |
Seasons by the noon-UTC rule; rulers after Ptolemy.2
Born at this point in Sagittarius season
Someone born at this edge of Sagittarius feels the next chapter pulling before the current one has finished. They can have half a bag packed and still want one more conversation before leaving. Friends notice how quickly they agree to a trip, then how carefully they pause at the door. The boundary teaches them that leaving well takes as much care as arriving. They are most at ease when they can go and still come back.
Interpretation, not prediction.
The sidereal sign
| Sidereal sign, Lahiri ayanamsa | Scorpio, all 101 years |
|---|---|
| Noon Sun, sidereal Scorpio | 26°–27.4° |
| Convention | Indian (Vedic) astrology |
Ayanamsa convention.5
Born on December 12
- Gustave Flaubert (1821–1880), French novelist
- Edvard Munch (1863–1944), Norwegian painter
- Alfred Werner (1866–1919), Swiss chemist Nobel laureate
- Frank Sinatra (1915–1998), American singer and actor
- Connie Francis (1937–2025), American singer and actress
- Rajinikanth (1950), Indian actor
- Jennifer Connelly (1970), American actress
- Michael Olise (2001), French footballer
Birth dates checked on Wikidata.7
December 12 in history
Observed on this date:
Events on December 12:
- 1787: Pennsylvania becomes the second state to ratify the US Constitution.
- 1917: Father Edward J. Flanagan founds Boys Town as a farm village for wayward boys.
- 1956: United Nations Security Council Resolution 121 relating to acceptance of Japan to the United Nations is adopted.
- 2012: North Korea successfully launches its first satellite, Kwangmyŏngsŏng-3 Unit 2.
- 2024: Indian Grandmaster Gukesh Dommaraju became the undisputed World Chess Champion in a tournament held in Singapore, making him the 18th and the youngest champion in chess history.
How the answer was worked out
Each year from 1930 through 2030, the Sun's tropical longitude on December 12 was calculated at noon UTC with Astronomy Engine, and the sign for that year was read from it.1 How the Machine works
Questions people also ask
What zodiac sign is December 12?
In all 101 years sampled from 1930 to 2030, December 12 is Sagittarius, with the Sun counted at noon UTC.
Is December 12 on a zodiac cusp?
No. The noon Sun occupied Sagittarius on each December 12 from 1930 to 2030, and December 12 is situated at least 8 days from the nearest change of sign.
What decan is December 12?
Within Sagittarius, December 12 crosses between two decans, with 26 sampled years in the second, the face of the Moon, and 75 in the third, the face of Saturn.
What is the birthday number for December 12?
Modern numerology pairs December 12 with day number 3 and month-day number 6, and digit addition yields both.
Sources
- Astronomy Engine JavaScript reference — Don Cross, Astronomy Engine. Verified .
- Ptolemy, Tetrabiblos, Book I — LacusCurtius, University of Chicago. Verified .
- Decan (astrology): the faces of the planets (after Lilly) — Wikipedia. Verified .
- Life Path Number — Numerology.com (practitioner site). Verified .
- Ayanamsa (Lahiri and other sidereal conventions) — Wikipedia. Verified .
- Sagittarius (astrology) — Wikipedia. Verified .
- Wikipedia: December 12 — Wikipedia (Wikimedia On this day feed); birth dates checked on Wikidata. Verified .