Birthday signs · Sagittarius season
What zodiac sign is December 13?
December 13 occupies the sign of Sagittarius in the tropical zodiac. Over the 101 years from 1930 through 2030, the Sun occupied Sagittarius at noon UTC on December 13, at 20.52° to 22.01° Sagittarius. Day 21 or 22 of Sagittarius season is December 13, which lies in the late part with the element fire.
Calculated across 1930–2030 · checked .
December 13 is Sagittarius
| Sagittarius at noon UTC | 101 of 101 years, 1930–2030 |
|---|---|
| Nearest change of sign | at least 7 days away |
| Birth time needed for the sign | no |
December 13 at a glance
| Sign | ♐︎ Sagittarius, the Archer |
|---|---|
| Element and mode | fire, mutable |
| Polarity | positive (masculine) |
| Ruler | Jupiter (traditional) |
| Sun on this date | 20.5° to 22° Sagittarius at noon UTC, 1930–2030 |
| Day of the season | day 21 or 22 of Sagittarius season |
| Decan | third (20°–30°), face of Saturn |
| Sidereal sign (Lahiri) | Scorpio |
| Day number | 4 (modern numerology) |
Rulers: Ptolemy; modern list.6
The decan: late Sagittarius
| Noon Sun | 20.52° to 22.01° Sagittarius |
|---|---|
| Decan | third (20°–30°) |
| Face ruler, Chaldean order | Saturn |
Faces after Lilly, in Chaldean order.3
December 13 by the numbers
| Day number | 4 (1 + 3 = 4) |
|---|---|
| Month-day number | 7 (3 + 4) |
| System | modern numerology, digit sums |
Digit sums as numerology guides give them.4
Where the date falls in the season
| Day of Sagittarius season | 21 or 22 |
|---|---|
| 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
A person born on December 13 arrives late in Sagittarius, when the season's appetite for open roads starts to meet a wish to see things finished. Ideas come easily to them. Follow-through asks for slower, steadier work, and that gap is where much of their learning happens. Many of their best moments come after the first excitement fades and the real work begins.
Interpretation, not prediction.
The sidereal sign
| Sidereal sign, Lahiri ayanamsa | Scorpio, all 101 years |
|---|---|
| Noon Sun, sidereal Scorpio | 27°–28.4° |
| Convention | Indian (Vedic) astrology |
Ayanamsa convention.5
Born on December 13
- Pope Sixtus V (1521–1590), pope of the Catholic Church from 1585 to 1590
- Henry IV of France (1553–1610), King of Navarre from 1572 to 1610 and King of France from 1589 to 1610
- Heinrich Heine (1797–1856), German poet, writer and literary critic
- Christopher Plummer (1929–2021), Canadian actor
- Ben Bernanke (1953), American economist
- Steve Buscemi (1957), American actor
- Jamie Foxx (1967), American actor, comedian, and singer
- Taylor Swift (1989), American singer-songwriter
Birth dates checked on Wikidata.7
December 13 in history
Observed on this date:
- Acadian Remembrance Day (Acadians)
- National Day (Saint Lucia)
- Martial Law Victims Remembrance Day (Poland)
- Nanjing Massacre Memorial Day (China)
- Nusantara Day (Indonesia)
- Republic Day (Malta)
- Sailor's Day (Brazil)
- Saint Lucia Day (mainly in Scandinavia)
Events on December 13:
- 1076: The city of Salerno surrenders to Robert Guiscard. Duke Gisulf continues his resistance in the citadel until May of the following year.
- 1623: The Plymouth Colony establishes the system of trial by 12-men jury in the American colonies.
- 1949: The Knesset votes to move the capital of Israel from Tel Aviv to Jerusalem.
- 1974: Malta becomes a republic within the Commonwealth of Nations.
- 2007: The Treaty of Lisbon is signed by the EU member states to amend both the Treaty of Rome and the Maastricht Treaty which together form the constitutional basis of the EU. The Treaty of Lisbon is effective from 1 December 2009.
How the answer was worked out
Astronomy Engine was used to calculate the Sun's tropical longitude on December 13 at noon UTC for each year from 1930 through 2030, and each year's sign was read from the result.1 How the Machine works
Questions people also ask
What zodiac sign is December 13?
December 13 falls in Sagittarius in all 101 sampled years from 1930 to 2030, counting the Sun at noon UTC.
Is December 13 on a zodiac cusp?
No. Each December 13 from 1930 to 2030 shows the noon Sun in Sagittarius, and December 13 stands at least 7 days from the nearest change of sign.
What decan is December 13?
Sagittarius (20°–30°) holds December 13 in its third decan in every sampled year, so the Chaldean face ruler is Saturn.
What is the birthday number for December 13?
Digit addition is the method by which modern numerology determines day number 4 and month-day number 7 for December 13.
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 13 — Wikipedia (Wikimedia On this day feed); birth dates checked on Wikidata. Verified .