The Sea-Goat · December 22 – January 19
January 17 Zodiac Sign
Born on January 17, you're a Capricorn — disciplined, ambitious and patient — the zodiac's master strategist.
Zodiac sign
Element · Modality
Earth · Cardinal
Decan (third)
Sun-ruled
Birthstone
Garnet
Birth flower
Carnation
Season position
Day 27 of 29
What astrology says about a January 17 birthday
January 17 is day 27 of Capricorn season, so astrologers link it with the sign's core character: ambitious, disciplined, responsible, patient. Traits astrologers commonly associate with Capricorn include responsible and trustworthy; calm and strategic under pressure; loyal to family and close friends.
A commonly cited growth area for Capricorn: can seem reserved or distant at first. For the full picture of the sign, read the Capricorn guide.
3rd decan of Capricorn: Sun
Each sign is divided into three decans, 10° slices that the Sun crosses in about ten days each. January 17 falls in the third decan of Capricorn (about January 11–19), which the traditional Chaldean system assigns to Sun. Astrologers say that adds vitality, confidence and a need to be seen.
The Sun lends a natural presence and a strong sense of self, which astrologers read as a natural presence, a strong sense of self and pride in one's work.
The number 17 in numerology
The 17 is associated with poise and self-command. Numerologists read 17th-of-the-month birthdays as analytical, dignified and good at long-range planning.
Numerology is a separate tradition from astrology and is offered here for interest.
January birthstone and flower
The modern birthstone for January is Garnet and the commonly listed birth flower is the carnation. January falls in deep winter in the northern hemisphere and high summer in the southern.
Capricorn love and compatibility
Capricorn approaches love the way they approach everything else: seriously and with the long term in mind. They are not interested in games; they're interested in building a life with someone.
Astrology is a symbolic tradition, not a science, and interpretations vary between astrologers. This page is for reflection and entertainment, not prediction or advice.
Beyond your January 17 Sun sign
Your Capricorn Sun is one planet. Your Moon, Rising sign and the exact Sun-ruled decan details live in your full natal chart. Get yours free on Skygram.
Get my free birth chartJanuary 17 birthday FAQ
What zodiac sign is January 17?
January 17 falls in Capricorn, which runs from December 22 to January 19 in the tropical zodiac. The Sun changes sign at a slightly different moment each year, so the boundary can fall a day or so either side of these dates. If you were born close to the edge, your birth year, time and place decide it.
Is January 17 a cusp birthday?
Not by the usual definition, which counts the first and last couple of days of a sign. January 17 is day 27 of Capricorn season, so it is normally read as a clear Capricorn birthday.
Which decan is January 17?
January 17 is in the third decan of Capricorn (January 11–19). In the traditional Chaldean system this decan is ruled by Sun, which astrologers say adds its own flavour to Capricorn. Some modern astrologers assign decan rulers by element instead, which gives different planets, and decans are strictly 10° slices of the zodiac, so the date range is approximate.
What are the birthstone and flower for January?
The modern birthstone for January is Garnet and the birth flower is the carnation. These come from calendar tradition rather than astrology, and the lists vary by country and source.