Capricorn (♑) is the zodiac sign for people born December 22 – January 19. It is a Earth sign ruled by Saturn. Key traits: disciplined, ambitious, responsible, patient.
Capricorn is a earth sign, and people born under it are often described as disciplined, ambitious, responsible, patient. In Western (tropical) astrology, your "sun sign" is determined by the Sun's position on your birth date — which for Capricorn means being born between December 22 – January 19.
Note that exact cusp dates can shift by about a day from year to year because the tropical zodiac is tied to the equinox, not the fixed calendar. If you were born on a cusp date, check the precise boundary for your birth year.