Birthday signs · Capricorn season
What zodiac sign is January 20?
Using the noon UTC Sun from 1930 to 2030, January 20 is Capricorn in 53 of 101 years and Aquarius in 48. The noon Sun on January 20 had a range from 29.23° Capricorn to 0.72° Aquarius. The sign that applies to January 20 is set by the birth year and time.
Calculated across 1930–2030 · checked .
January 20: Capricorn or Aquarius
| Capricorn at noon UTC | 53 of 101 years |
|---|---|
| Aquarius at noon UTC | 48 of 101 years |
| Aquarius years include | 1933, 1937 and 1941 |
| Settled by | birth year and time |
January 20 at a glance
| Sign | ♑︎ Capricorn (53 years) or ♒︎ Aquarius (48) |
|---|---|
| Element and mode | earth, cardinal |
| Polarity | negative (feminine) |
| Ruler | Saturn (traditional) |
| Sun on this date | 29.2° Capricorn to 0.7° Aquarius at noon UTC, 1930–2030 |
| Day of the season | Capricorn day 29 or 30; Aquarius day 1 |
| Decan | third (20°–30°), face of the Sun |
| Sidereal sign (Lahiri) | Capricorn |
| Day number | 2 (modern numerology) |
Rulers: Ptolemy; modern list.6
The decan: late Capricorn
| Noon Sun | 29.23° Capricorn to 0.72° Aquarius |
|---|---|
| Decan | third (20°–30°) |
| Face ruler, Chaldean order | the Sun |
| Aquarius years | 0°–0.72° Aquarius |
Faces after Lilly, in Chaldean order.3
January 20 by the numbers
| Day number | 2 (2 + 0 = 2) |
|---|---|
| Month-day number | 3 (1 + 2) |
| System | modern numerology, digit sums |
Digit sums as numerology guides give them.4
Where the date falls in the season
| Day of Capricorn season | 29 or 30 (in its Capricorn years) |
|---|---|
| Day of Aquarius season | 1 (in its Aquarius years) |
| Capricorn season opened | December 22 (39 years) or December 23 (14) |
| Capricorn season closed | January 20 (53 years) |
| Element and mode | earth, cardinal |
| Traditional ruler | Saturn |
Seasons by the noon-UTC rule; rulers after Ptolemy.2
Born at this point in Capricorn season
Born on January 20, this person arrived near the close of the Capricorn season, when the slow climb is almost at the top. They know the feeling of nearly finishing something and wanting the last step to be done already. Patience built their steady habits, yet a restless urge to see results pushes them to rush the final stretch. Friends see them rereading a plan before sending it, and that last check is their way of making sure the work holds.
Interpretation, not prediction.
The sidereal sign
| Sidereal sign, Lahiri ayanamsa | Capricorn, all 101 years |
|---|---|
| Noon Sun, sidereal Capricorn | 5.7°–7.1° |
| Convention | Indian (Vedic) astrology |
Ayanamsa convention.5
Born on January 20
- Charles III of Spain (1716–1788), King of Spain from 1759 to 1788
- André-Marie Ampère (1775–1836), French physicist and mathematician
- Johannes V. Jensen (1873–1950), Danish author
- Aristotle Onassis (1906–1975), Greek shipping magnate
- Federico Fellini (1920–1993), Italian filmmaker
- Buzz Aldrin (1930), American astronaut
- David Lynch (1946–2025), American filmmaker
- Nikki Haley (1972), American politician and diplomat
Birth dates checked on Wikidata.7
January 20 in history
Observed on this date:
- Armed Forces Day (Mali)
- Army Day (Laos)
- Heroes' Day (Cape Verde)
- Martyrs' Day (Azerbaijan)
- Presidential inaugurations (United States)
Events on January 20:
- 1265: The first English parliament to include not only Lords but also representatives of the major towns holds its first meeting in the Palace of Westminster, now commonly known as the "Houses of Parliament".
- 1523: Christian II is forced to abdicate as King of Denmark and Norway.
- 1954: In the United States, the National Negro Network is established with 40 charter member radio stations.
- 2001: President of the Philippines Joseph Estrada is ousted in a nonviolent four-day revolution, and is succeeded by Gloria Macapagal Arroyo.
How the answer was worked out
Astronomy Engine calculated the Sun's tropical longitude on January 20 at noon UTC for each year from 1930 through 2030, and the sign for each year was then read from it.1 How the Machine works
Questions people also ask
What zodiac sign is January 20?
Sampled over 101 years at noon UTC, January 20 is usually Capricorn in 53 of them and Aquarius in the other 48.
Is January 20 on a zodiac cusp?
Yes. Under the noon UTC convention the sample splits into Capricorn in 53 years and Aquarius in 48, since in some years the Sun moved from Capricorn into Aquarius during January 20, and the birth year and time decide which sign applies.
What decan is January 20?
In all sampled years January 20 appears in the third decan of Capricorn (20°–30°), giving the Sun as its face ruler in the Chaldean order.
What is the birthday number for January 20?
Within modern numerology, adding digits produces a day number of 2 and a month-day number of 3 for January 20.
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 .
- Capricorn (astrology) — Wikipedia. Verified .
- Wikipedia: January 20 — Wikipedia (Wikimedia On this day feed); birth dates checked on Wikidata. Verified .