Wikipedia:Selected anniversaries/December 20
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This is a list of selected December 20 anniversaries that appear in the "On this day" section of the Main Page. To suggest a new item, in most cases, you can be bold and edit this page. Please read the selected anniversaries guidelines before making your edit. However, if your addition might be controversial or on a day that is or will soon be on the Main Page, please post your suggestion on the talk page instead.
Please note that the events listed on the Main Page are chosen based more on relative article quality and to maintain a mix of topics, not based solely on how important or significant their subjects are. Only four to five events are posted at a time and thus not everything that is "most important and significant" can be listed. In addition, an event is generally not posted this year if it is also the subject of the scheduled featured article, featured list or picture of the day.
To report an error when this appears on the Main Page, see Main Page errors. Please remember that this list defers to the supporting articles, so it is best to achieve consensus and make any necessary changes there first.
Images
Use only ONE image at a time
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Louisiana Purchase treaty -
Donna Reed, James Stewart, and Karolyn Grimes in "It's a Wonderful Life" -
Experimental Breeder Reactor I -
Four light bulbs were lit with electricity generated from the EBR-1 reactor. -
The sword-and-shield emblem of the Cheka-KGB -
Flag of Concelho de Macau, one of the two concelhos of Macau under Portuguese rule
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MV Doña Paz in port -
Luis Carrero Blanco
Ineligible
| Blurb | Reason |
|---|---|
| 1803 – As part of the Louisiana Purchase, New Orleans in the French territory of Louisiana was officially transferred to the United States. | refimprove |
| 1917 – The Cheka, the first Soviet secret police, was established by a decree issued by Vladimir Lenin. | refimprove |
| 1941 – World War II: The Flying Tigers of the Chinese Air Force engaged in its first combat missions. | refimprove section |
| 1946 – Frank Capra's popular Christmas film It's a Wonderful Life was first released in New York City. | refimprove section |
| 1973 – Spanish Prime Minister Luis Carrero Blanco was assassinated by a bomb planted by members of the Basque nationalist and separatist group ETA. | needs more footnotes |
| 1999 – Portugal transferred sovereignty of Macau, which it had administered since the mid-16th century, to China. | Macau: outdated; Transfer of sovereignty: refimprove |
Eligible
- 1951 – Experimental Breeder Reactor I near Arco, Idaho, US, became the world's first electricity-generating nuclear power plant when it produced sufficient electricity to illuminate four 200-watt light bulbs.
- 1968 – The Zodiac Killer murdered the first of his five confirmed victims in Vallejo, California, a case which remains unsolved.
- 1988 – The United Nations Convention Against Illicit Traffic in Narcotic Drugs and Psychotropic Substances governing international cooperation against the illegal drug trade was signed in Vienna.
- 1995 – As per the Dayton Agreement that ended the Bosnian War, the NATO-led IFOR began peacekeeping operations in Bosnia and Herzegovina.
- 1995 – American Airlines Flight 965 crashed into a mountain in Buga, Colombia, killing 151 passengers and 8 crew members.
- 2005 – US district court Judge John E. Jones III ruled against mandating the teaching of "intelligent design" in his ruling of Kitzmiller v. Dover Area School District.
Notes
- SilkAir Flight 185 appears on December 19, so American Airlines Flight 965 should not appear in the same year
- 1860 – South Carolina became the first of eleven slave states to secede from the United States, leading to the eventual creation of the Confederate States of America and later the American Civil War.
- 1955 – Cardiff (Cardiff City Hall pictured) was proclaimed as the capital of Wales.
- 1987 – The deadliest peacetime maritime disaster in history occurred when the MV Doña Paz sank after colliding with an oil tanker on the Tablas Strait in the Philippines, resulting in an estimated 4,000 deaths.
- 1989 – American forces invaded Panama to overthrow the government of Manuel Noriega.
- 2007 – Pablo Picasso's Portrait of Suzanne Bloch was stolen from the São Paulo Museum of Art.