Birthdays
Famous people born on December 21
Short answer
In 2026, December 21 has the number 7/16. The typical sun sign for December 21 is Sagittarius (November 22 to December 21). The Sun changes sign at a moment that moves by up to a day from year to year, so in some years December 21 falls in Capricorn.
People born on December 21
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Astrology, BaZi and numerology here are for entertainment, not statements of fact about anyone.