2025 Days and Dates

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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

  • Summer Solstice / Start of Summer - Southern Hemisphere (Spanish: Inicio del Verano)
  • Winter Solstice / 1st Day of Winter (Northern Hemisphere) (Spanish: Inicio del Invierno - Norte)
  • 1st Day of Winter (1er jour de l'hiver) - Belgium

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