2025 Days and Dates - US

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December 21, 2025 calendar

is ...

  • 355th day of the year. There are then 10 days left in 2025.
  • 51st Sunday of 2025.
  • on the 52nd week of 2025 (using US standard week number calculation).
  • 1st day of Winter. There are 89 days left till Spring.
  • Birthstone for this day: Turquoise & Blue Topaz

December 21, Zodiac Sign

Zodiac
Sagittarius

December 21, 2025 United States Holidays & Popular Observances

December 21, 2025 Popular Holidays & Observances Worldwide

  • Beginning of Winter (Winter Solstice) -
  • Fourth Sunday of Advent -
  • Hanukkah (Continues) -
  • Summer starts (Inicio del Verano) -
  • Kids' Day (Детињци) - Serbia
  • Gravy Day - Australia
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