Birthday signs · Sagittarius season
What zodiac sign is December 15?
Sagittarius is where December 15 sits in the tropical zodiac. Within the 101 years from 1930 through 2030, the Sun stood in Sagittarius at noon UTC on December 15, at 22.56° to 24.05° Sagittarius. On day 23 or 24 of Sagittarius season, December 15 is in its late part, with the element fire.
Calculated across 1930–2030 · checked .
December 15 is Sagittarius
| Sagittarius at noon UTC | 101 of 101 years, 1930–2030 |
|---|---|
| Nearest change of sign | at least 5 days away |
| Birth time needed for the sign | no |
December 15 at a glance
| Sign | ♐︎ Sagittarius, the Archer |
|---|---|
| Element and mode | fire, mutable |
| Polarity | positive (masculine) |
| Ruler | Jupiter (traditional) |
| Sun on this date | 22.6° to 24° Sagittarius at noon UTC, 1930–2030 |
| Day of the season | day 23 or 24 of Sagittarius season |
| Decan | third (20°–30°), face of Saturn |
| Sidereal sign (Lahiri) | Scorpio (79 yrs), Sagittarius (22 yrs) |
| Day number | 6 (modern numerology) |
Rulers: Ptolemy; modern list.6
The decan: late Sagittarius
| Noon Sun | 22.56° to 24.05° Sagittarius |
|---|---|
| Decan | third (20°–30°) |
| Face ruler, Chaldean order | Saturn |
Faces after Lilly, in Chaldean order.3
December 15 by the numbers
| Day number | 6 (1 + 5 = 6) |
|---|---|
| Month-day number | 9 (3 + 6) |
| System | modern numerology, digit sums |
Digit sums as numerology guides give them.4
Where the date falls in the season
| Day of Sagittarius season | 23 or 24 |
|---|---|
| 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
Born in the late stretch of Sagittarius, this person comes into the season after the big optimism has already been tested. They have watched plenty of exciting plans start fast and stall. So they now want evidence before they promise anything. Friends see them as the one who wanders off, but they still circle back to finish what matters to them. Their wide curiosity meets the plain details of daily life, and that meeting is where their growth happens.
Interpretation, not prediction.
The sidereal sign
| Sidereal sign, Lahiri ayanamsa | Scorpio in 79 years, Sagittarius in 22 |
|---|---|
| Noon Sun, sidereal Scorpio | 29°–30° |
| Years in sidereal Sagittarius | between 1932 and 1992 |
| Convention | Indian (Vedic) astrology |
Ayanamsa convention.5
Born on December 15
- Gustave Eiffel (1832–1923), French chemical engineer and architect
- Henri Becquerel (1852–1908), French physicist
- L. L. Zamenhof (1859–1917), Polish-Jewish physician and inventor of Esperanto
- Niels Ryberg Finsen (1860–1904), Faroese physician and scientist and Nobel laureate
- Oscar Niemeyer (1907–2012), Brazilian architect
- Maurice Wilkins (1916–2004), New Zealand-born English physicist and biologist
- Freeman Dyson (1923–2020), theoretical physicist and mathematician
- Keylor Navas (1986), Costa Rican association football player
Birth dates checked on Wikidata.7
December 15 in history
Observed on this date:
- 2nd Amendment Day (South Carolina)
- Homecoming Day (Alderney)
- Kingdom Day (Netherlands), moves to December 16 if the 15th is on a Sunday
- Zamenhof Day (International Esperanto Community)
- World Turkic Language Family Day (UNESCO)
Events on December 15:
- 1869: The short-lived Republic of Ezo is proclaimed in the Ezo area of Japan. It is the first attempt to establish a democracy in Japan.
- 1905: The Pushkin House is established in Saint Petersburg, Russia, to preserve the cultural heritage of Alexander Pushkin.
- 1973: John Paul Getty III, grandson of American billionaire J. Paul Getty, is found alive near Naples, Italy, after being kidnapped by an Italian gang on July 10.
- 2001: The Leaning Tower of Pisa reopens after 11 years and $27,000,000 spent to stabilize it, without fixing its famous lean.
How the answer was worked out
For each year from 1930 through 2030, Astronomy Engine calculated the Sun's tropical longitude on December 15 at noon UTC, and each year's sign was read from that longitude.1 How the Machine works
Questions people also ask
What zodiac sign is December 15?
Counting the Sun at noon UTC, December 15 is Sagittarius in every one of the 101 sampled years from 1930 to 2030.
Is December 15 on a zodiac cusp?
No. On all December 15 dates from 1930 to 2030, the noon Sun was in Sagittarius, and December 15 is at least 5 days from the nearest change of sign.
What decan is December 15?
December 15 is found in the third decan of Sagittarius (20°–30°) in every sampled year, and the corresponding Chaldean face ruler is Saturn.
What is the birthday number for December 15?
In modern numerology, December 15 has a day number of 6 and a month-day number of 9, both found by adding digits.
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 15 — Wikipedia (Wikimedia On this day feed); birth dates checked on Wikidata. Verified .