What Day Of The Week Is December 21?

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Monday December 21, 2026
A date scroll with Latin text from “The Extremes of Good and Evil” by Cicero, written in 45 BC.

December 21: Day of the Week

December 21, 2026 is the 355th day of the year 2026 in the Gregorian calendar. There are 10 days remaining until the end of the year. The day of the week is Monday.

If you are trying to learn French then this day of the week in French is lundi.

Here’s the December calendar. You can also browse the full year monthly calendar.

December 2026
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Zodiac & Birthstone

Sagittarius is the zodiac sign of a person born on this day. Turquoise is the modern birthstone for this month. Onyx is the mystical birthstone from Tibetan origin that dates back over a thousand years.

December 21: This Day in History

This is a frequent day for the winter solstice to occur in the northern hemisphere and summer solstice to occur in the southern hemisphere.

December 21 by the Numbers

  • 308 days since December 21
  • 0 year, 10 months, and 5 days ago
  • 10 months since then
  • December 21 is in the 52nd week of the year 2026 (ISO 8601)
  • 44 weeks ago
  • The year 2026 is not a leap year

December 21 Historical Event(s)

1826American settlers in Nacogdoches, Mexican Texas, declare their independence, starting the Fredonian Rebellion. 1872Challenger expedition: HMS Challenger, commanded by Captain George Nares, sails from Portsmouth. 1883The first Permanent Force cavalry and infantry regiments of the Canadian Army are formed: The Royal Canadian Dragoons and The Royal Canadian Regiment. 1913Arthur Wynne’s “word-cross”, the first crossword puzzle, is published in the New York World. 1937Snow White and the Seven Dwarfs, the world’s first full-length animated feature, premieres at the Carthay Circle Theater. 1962Rondane National Park is established as Norway’s first national park. 1979Lancaster House Agreement: An independence agreement for Rhodesia is signed in London by Lord Carrington, Sir Ian Gilmour, Robert Mugabe, Joshua Nkomo, Bishop Abel Muzorewa and S.C. Mundawarara. 1992A Dutch DC-10, flight Martinair MP 495, crashes at Faro Airport, killing 56 people. 1994Mexican volcano Popocatepetl, dormant for 47 years, erupts gases and ash. 1995The city of Bethlehem passes from Israeli to Palestinian control.

Who were born on December 21?

1795John Russell, English parson and dog breeder (d. 1883) 1892Walter Hagen, American golfer (d. 1969) 1914Ivan Generalić, Austro-Hungarian-born Croatian painter (d. 1992) 1917Heinrich Böll, German writer and Nobel laureate (d. 1985) 1935Lorenzo Bandini, Italian racecar driver (d. 1967) 1943André Arthur. Canadian radio host 1952Joaquín Andújar, Dominican baseball player 1960Roger McDowell, American baseball player 1972Gloria De Piero, English journalist 1972Y.S. Jagan Mohan Reddy, Indian politician

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