About December 20
December 20, 2025 is the 354th day of the year 2025 in the Gregorian calendar. There are 11 days remaining until the end of this year. The day of the week is Saturday.
You can browse the full year calendar in case you need it.
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Sagittarius is the sun 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.
According to the lunisolar Chinese calendar, there are 59 days remaining before the start of the next Chinese New Year.
What Happened On December 20
- 1522 –Siege of Rhodes: Suleiman the Magnificent accepts the surrender of the surviving Knights of Rhodes, who are allowed to evacuate. They eventually settle on Malta and become known as the Knights of Malta.
- 1803 –The Louisiana Purchase is completed at a ceremony in New Orleans.
- 1808 –Peninsular War: The Siege of Zaragoza begins.
- 1860 –South Carolina becomes the first state to attempt to secede from the United States.
- 1917 –Cheka, the first Soviet secret police, is founded.
- 1924 –Hitler is released from Landsberg Prison
- 1941 –World War II: First battle of the American Volunteer Group, better known as the “Flying Tigers” in Kunming, China.
- 1942 –World War II: Bombing of Calcutta by the Japanese.
- 1951 –The EBR-1 in Arco, Idaho becomes the first nuclear power plant to generate electricity. The electricity powered four light bulbs.
- 1952 –United States Air Force C-124 crashes and burns in Moses Lake, Washington killing 87.
- 1968 –The Zodiac Killer kills Betty Lou Jenson and David Faraday in Vallejo, California.
- 1971 –Zulfikar Ali Bhutto takes over as the fourth President of Pakistan.
- 1987 –History’s worst peacetime sea disaster, when the passenger ferry Doña Paz sinks after colliding with the oil tanker Vector 1 in the Tablas Strait in the Philippines, killing an estimated 4,000 people (1,749 official).
- 1988 –The United Nations Convention Against Illicit Traffic in Narcotic Drugs and Psychotropic Substances is signed in Vienna.
- 1989 –United States invasion of Panama: The United States sends troops into Panama to overthrow government of Manuel Noriega. This is also the first combat use of purpose-designed stealth aircraft.
- 1995 –NATO begins peacekeeping in Bosnia.
- 1996 –NeXT merges with Apple Computer, starting the path to Mac OS X.
- 1999 –Macau is handed over to the People’s Republic of China by Portugal.
- 2005 –US District Court Judge John E. Jones III rules against mandating the teaching of “intelligent design” in his ruling of Kitzmiller v. Dover Area School District.
- 2007 –Elizabeth II becomes the oldest ever monarch of the United Kingdom, surpassing Queen Victoria, who lived for 81 years, 7 months and 29 days.
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