Born on January 21
Famous people born on January 21, those you most likely know first. Each opens their birth chart.
Born that day 16
Born on January 21 yourself?
Your Sun is in Capricorn or Aquarius: it changes sign on this day in some years, and your chart settles which. Your Moon, your rising sign and the rest are yours alone, from the year, the minute and the place you were born.