National days, ongoing national weeks and months, and global observances for December 20, 2026. Plus historical events and birthdays.
December 20, 2026 celebrates Mudd Day, plus 2 more.
Read the full story →Events that occurred on December 20 throughout history
France transfers the authority of 828,000 square miles of land over to the United States completing the sale of the Louisiana Purchase.
The U.S. Patent Office issued the first patent No. 488,494 to Alexander T. Brown and George Stillman of Syracuse, NY for a pneumatic vehicle tire that "readily and easily detached from or applied to the rim of a wheel."
Directed by Frank Capra, It's a Wonderful Life, premieres in New York City. Starring James Stewart, Donna Reed, and Lionel Barrymore, the perennial Christmas film earned four Oscar nominations.
Dr. Bernard Kouchner and several Paris journalists founded Doctors Without Borders.
President Donald Trump signed legislation creating the United States Space Force. December 20th Celebrated Birthdays
Longer-running observances that include this date.
Universal Human Rights Month
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Bingo's Birthday Month
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Operation Santa Paws | December 1-24th
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Learn A Foreign Language Month
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National Drunk & Drugged Driving Prevention Month
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International Sharps Injury Prevention Awareness Month
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Spiritual Literacy Month
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Safe Toys And Gifts Month
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National Tie Month
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National Write A Business Plan Month
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Root Vegetables And Exotic Fruit Month
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Worldwide Food Service Safety Month
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Showing the first 12 — See all months for December.
