What Day Of The Week Is December 21?

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 Spanish then this day of the week in Spanish is lunes.

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

December					2026
Sun	Mon	Tue	Wed	Thu	Fri	Sat
1	2	3	4	5
6	7	8	9	10	11	12
13	14	15	16	17	18	19
20	21	22	23	24	25	26
27	28	29	30	31

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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.

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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)

1598Battle of Curalaba: The revolting Mapuche, led by cacique Pelentaru, inflict a major defeat on Spanish troops in southern Chile. 1861Medal of Honor: Public Resolution 82, containing a provision for a Navy Medal of Valor, is signed into law by President Abraham Lincoln. 1879World première of Henrik Ibsen’s A Doll’s House at the Royal Theatre in Copenhagen. 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. 1967Louis Washkansky, the first man to undergo a heart transplant, dies in Cape Town, South Africa, after living for 18 days after the transplant. 1968Apollo program: Apollo 8 launched from the Kennedy Space Center, placing its crew on a lunar trajectory for the first visit to another celestial body by humans. 1969The United Nations adopts the Convention on the Elimination of All Forms of Racial Discrimination. 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.

Who were born on December 21?

1859Gustave Kahn, French poet (d. 1936) 1914Frank Fenner, Australian microbiologist (d. 2010) 1923Intizar Hussain, Urdu writer and columnist 1939Lloyd Axworthy, Canadian politician 1943Jack Nance, American actor (d. 1996) 1947Bryan Hamilton, Northern Irish footballer 1964Fabiana Udenio, Argentine actress 1967Ervin Johnson, American basketball player 1971Brett Scallions, American singer (Fuel) 1981Lynda Thomas, Mexican singer

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Now try another date like anniversaries, birthdays of someone you know or any other date that is special to you. Don’t forget to share the info to your friends, loved ones or social media followers. Who knows, they might appreciate and thank you for it.

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