Wikipedia:Selected anniversaries/November 20
This is a list of selected November 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.
November 20: Zumbi Day in Brazil; Revolution Day in Mexico; Teacher's Day in Vietnam
- 284 – Diocletian became Roman Emperor, eventually establishing reforms that brought an end to the Crisis of the Third Century.
- 1820 – The American whaleship Essex sank 2,000 nautical miles (3,700 km) west of the western coast of South America after it was attacked by a sperm whale.
- 1902 – While discussing how to promote the newspaper L'Auto during a lunch meeting in Paris, sports journalists Henri Desgrange and Géo Lefèvre came up with the idea of holding a cycling race that became known as the Tour de France.
- 1945 – The Nuremberg Trials (defendants pictured) against 24 leading Nazis involved in the Holocaust and various war crimes during World War II began in Nuremberg, Germany.
- 1952 – The Slánský trial, a show trial against Czech General Secretary Rudolf Slánský and 13 other members of the Communist Party of Czechoslovakia was held.