What zodiac sign is January 23?

January 23 is Aquarius

Exact sign finder

January 23 at a glance

Rulers: Ptolemy; modern list.⁶

The decan: early Aquarius

Faces after Lilly, in Chaldean order.³

What a decan is

January 23 by the numbers

Digit sums as numerology guides give them.⁴

Where the date falls in the season

Seasons by the noon-UTC rule; rulers after Ptolemy.²

• Aquarius reference
• Aquarius compatibility

Born at this point in Aquarius season

Born in the early part of Aquarius, this person carries the sign's independence but is still finding out how much of it they want to show. When a friend pushes a plan they doubt, they pause and watch the room before speaking. They are not hiding their opinion. They are testing whether saying it will cost them a place they care about. Once they trust their own read, their honesty comes out steady and calm, and people who listened closely usually notice the change.

Interpretation, not prediction.

The sidereal sign

Ayanamsa convention.⁵

Tropical and sidereal, explained

Born on January 23

• Stendhal (1783–1842), French writer
• Édouard Manet (1832–1883), French painter
• David Hilbert (1862–1943), German mathematician
• Hideki Yukawa (1907–1981), Japanese theoretical physicist
• Gertrude B. Elion (1918–1999), American biochemist and pharmacologist
• Derek Walcott (1930–2017), Saint Lucian–Trinidadian poet and playwright
• Megawati Sukarnoputri (1947), 5th President of Indonesia (2001—2004) and 8th Vice President of Indonesia (1999—2001)
• Arjen Robben (1984), Dutch association football player

Birth dates checked on Wikidata.⁷

January 23 in history

Observed on this date:

• Bounty Day (Pitcairn Islands)
• Netaji Subhas Chandra Bose's Jayanti (Assam, Orissa, Tripura, and West Bengal, India)
• World Freedom Day (Taiwan and South Korea)

Events on January 23:

• 393: Roman emperor Theodosius I proclaims his eight-year-old son Honorius co-emperor.
• 1719: The Principality of Liechtenstein is created within the Holy Roman Empire.
• 1912: The First International Opium Convention is signed at The Hague.
• 1957: American inventor Walter Frederick Morrison sells the rights to his flying disc to the Wham-O toy company, which later renames it the "Frisbee".
• 2003: A very weak signal from Pioneer 10 is detected for the last time, but no usable data can be extracted.

How the answer was worked out

With Astronomy Engine, the Sun's tropical longitude on January 23 was computed at noon UTC for each year from 1930 through 2030, and each year's sign was taken from it.¹ How the Machine works

Questions people also ask

What zodiac sign is January 23?

In all 101 sampled years from 1930 to 2030, January 23 is Aquarius, counting the Sun at noon UTC.

Is January 23 on a zodiac cusp?

No. In every January 23 from 1930 to 2030, the Sun at noon was in Aquarius, and January 23 is at least 2 days from the nearest sign change.

What decan is January 23?

For every sampled year, January 23 is placed in the first decan of Aquarius (0°–10°), so the Chaldean face ruler assigned is Venus.

What is the birthday number for January 23?

Adding digits gives January 23 a day number of 5 and a month-day number of 6 in modern numerology.