January 20 at a glance
- Zodiac sign
- ♒ Aquarius
- Element and modality
- air, fixed
- Ruling planet
- Uranus
- Place in the sign
- Day 1 of Aquarius; Pisces starts 30 days later on the calendar
- Decan
- 1 of 3, ruled by Aquarius (January 20 to 29)
- Cusp
- Capricorn to Aquarius
- Birthday number
- 20 reduces to 2 (2 + 0 = 2)
- January birthstone
- Garnet
Ask about the zodiac sign for January 20
Your first question is free, once per person. A reader may answer; an answer is not guaranteed.
Deep winter and the opening of the water-bearer's year
Aquarius begins when the Sun reaches 300 degrees of ecliptic longitude, in the coldest part of the northern year and the warmest part of the southern. The sign belongs to air, not water, despite the picture of a figure pouring from a jar; the jar is an old image of knowledge being handed out.
January 20 is also Inauguration Day in the United States, a date fixed by the 20th Amendment in 1933 and used from 1937. In the calendar of other traditions the date falls close to the middle of the winter quarter, a quiet stretch with no great festival, which is part of why it is read as a thinking time.
Is January 20 a cusp date?
As the first day of a fixed air sign, a January 20 birthday is the model the tradition describes when it talks about Aquarius: independent, interested in systems and in how groups work, and slow to change a view once it has formed. The next sign back is Capricorn, whose practical streak can show if the Sun had not yet crossed at your birth, and the Cusp of Mystery is one popular name for that overlap.
The standard table gives Aquarius. The change from Capricorn into Aquarius can reach January 20 in some year and time zone within 2000 to 2050, so a birth on this date can belong to either sign.
Across 2000 to 2050 (51 years) the Sun entered Aquarius on these UTC dates: January 20 in 35, January 19 in 16.
Within those years the entry into Aquarius fell on January 19 between 15:40 and 23:50 UTC; on January 20 between 00:10 and 18:20 UTC. Clocks in populated time zones run from UTC-10 to UTC+12, so the same instant can read as the day before or the day after, and your birth time and birth place decide which side of it you were born.
| Year | Sun enters Aquarius |
|---|---|
| 2027 | about Jan 20, 07:30 UTC |
| 2028 | about Jan 20, 13:20 UTC |
| 2029 | about Jan 19, 19:10 UTC |
Born near that moment? The sun sign calculator takes your year, time and time zone.
The Aquarius decan for January 20
January 20 falls in decan 1 of Aquarius, January 20 to 29, ruled by Aquarius. Each sign is cut into three decans of about ten days, ruled in turn by the sign itself and the next two signs of its element.
Aquarius rules the first decan of its own sign, which makes it the least blended of the three. Decan tradition ties this stretch to originality and detachment with nothing borrowed from the signs that follow. Treat the ruler as a shade of the sign, not a separate personality.
Birthday number 2 for January 20
The day 20 reduces to 2: 2 + 0 = 2. No step lands on a master number.
A 20 reduces to 2, but the digits are worth a second look: 20 is two tens, and in numerology ten stands for a completed round of counting. Doubling it is read as completion shared between two things, which is why a 20 birthday is described as cooperative. As a number, 2 pairs well with an air sign that talks in terms of the group.
The January birthstone
Birthstones follow the month and not the day, so a birthday on January 20 shares Garnet with every other January birthday. See January birthstones.
January 20 zodiac questions
Is January 20 Aquarius or Capricorn?
Aquarius on the calendar most almanacs print. The Sun's actual entry has landed on January 19 or 20 in UTC depending on the year, and a birth before it in your time zone belongs to Capricorn. The table shows the counts.
Is Aquarius a water sign?
No. Aquarius is a fixed air sign. The water-bearer is a mythological figure, not an element, and the confusion is probably the most common one about the sign.
How is January 20 different from January 19?
January 19 is the last calendar day of Capricorn and January 20 the first of Aquarius. The Sun's crossing falls on one or the other depending on the year, so both are cusp dates and the ingress table counts them.
Dates next to January 20
Other January dates with their own page: January 19.
A birthday date is one piece of the chart
Our astrologers read the Moon, rising sign, houses and transits that a date cannot show.
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