January 21 Zodiac Sign: Capricorn or Aquarius?
The short answer
People born on January 21 can be Capricorn or Aquarius: the Sun changed sign during this date in 4 of the 76 years from 1950 to 2025, sitting between 29.8° Capricorn and 2.2° Aquarius.
January 21 at a glance
| Zodiac sign | Capricorn or Aquarius (conventional tables say Aquarius, January 20 to February 18) |
|---|---|
| Sun position, 1950 to 2025 | 29.8° Capricorn to 2.2° Aquarius (usually 1.0° Aquarius at noon UTC) |
| Decan | third decan of Capricorn: Virgo (triplicity), Sun (Chaldean), Four of Pentacles (Golden Dawn); first decan of Aquarius: Aquarius (triplicity), Venus (Chaldean), Five of Swords (Golden Dawn) |
| Element | Earth (Capricorn) or Air (Aquarius) |
| Modality | Cardinal (Capricorn) or Fixed (Aquarius) |
| Ruling planet | Saturn (Capricorn) or Uranus, traditionally Saturn (Aquarius) |
| Nearest sign change | On this date in 4 of the 76 years |
What a January 21 birthday means
On January 21 the Sun sits between 29.8° Capricorn and 2.2° Aquarius in every year from 1950 to 2025, counting every hour of the day in UTC. Its usual noon position is 1.0° Aquarius.
That places January 21 in the third decan of Capricorn. The modern triplicity system gives this decan to Virgo, the older Chaldean order gives it to the Sun, and the Golden Dawn tradition pairs it with the Four of Pentacles. In some years the Sun moves on into the first decan of Aquarius during this date, so both apply.
Capricorn is an earth sign of the cardinal modality, ruled by Saturn. Aquarius is an air sign of the fixed modality, ruled by Uranus.
January 21 is a cusp date. The Sun changed sign during this date in 4 of the 76 years charted, so someone born on January 21 can be Capricorn or Aquarius; the birth year and time decide it.
When the Sun changes sign around January 21
Across 1950 to 2025, the Sun entered Aquarius on these dates (UTC):
- January 19: 6 years
- January 20: 66 years
- January 21: 4 years
If you were born near the change, your birth year and time decide your sign: cast your free birth chart to see it.
Where these figures come from
The Sun's position was charted at 12:00 UTC on every day from 1950 to 2025, and the start and end of each date were placed on the straight line between neighbouring days, which is exact to a small fraction of a degree. The range covers every hour of January 21 in UTC across all 76 years; someone born far from UTC can sit up to about half a degree beyond it. Decans follow two traditional systems: the triplicity system, which gives each third of a sign to the three signs of its element in turn, and the older Chaldean order of faces, which runs through the seven classical planets from Mars at the start of Aries.
Other birthdays
January: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Every date of the year · Aquarius traits · Four of Pentacles
Born on January 21? Vera reads the whole chart, not just the Sun.
Your Sun sign is one line of your chart. Vera casts the rest from your birth time and place, then answers what you actually want to know.