Wikipedia:Selected anniversaries/December 21
This is a list of selected December 21 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 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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Emperor Vespasian -
The launch of Apollo 8 -
The crew of Apollo 8 -
HMS Challenger -
Rondane National Park
Ineligible
| Blurb | Reason |
|---|---|
| 69 – Vespasian became the fourth Roman emperor in the Year of the Four Emperors. | Vespasian and Year of Four Emperors both {{refimprove}} |
| 1844 – The Rochdale Pioneers, usually considered the first successful cooperative enterprise, opened their store in Rochdale, England, and formed the basis for the modern cooperative movement. | stubby |
| 1872 – HMS Challenger sailed from Portsmouth, England, on a scientific expedition, making many discoveries that laid the foundation of oceanography. | needs more footnotes |
| 1883 – The Royal Canadian Regiment and The Royal Canadian Dragoons, the oldest regular regiments of the Canadian Army, were both formed. | both {{refimprove}} |
| 1913 – British journalist Arthur Wynne published a "word-cross" puzzle in the New York World, which later became frequently cited as the first crossword puzzle. | unreferenced section |
| 1962 – Rondane National Park, Norway's first national park, was established. | refimprove |
| 1988 – A total of 270 people were killed when a bomb on board Pan Am Flight 103 exploded while the plane was in flight over Lockerbie, Scotland, launching an eventual three-year joint investigation by Britain's Dumfries and Galloway Constabulary and the United States' Federal Bureau of Investigation. | Flight article tagged {{story}}, investigation article has unreferenced section |
Eligible
- 1620 – The Mayflower Pilgrims landed at what is now Plymouth, Massachusetts, establishing the Plymouth Colony.
- 1826 – American settlers in Mexican Texas made the first attempt to secede from Mexico, establishing the short-lived Republic of Fredonia.
- 1919 – After serving two years in prison for encouraging people to resist military conscription, anarchist Emma Goldman (pictured) was deported from the United States to Russia.
- 1937 – Snow White and the Seven Dwarfs, the first full-length cel-animated feature in film history, premiered at the Carthay Circle Theatre in Los Angeles.
- 1968 – Apollo 8 launched from Florida's Kennedy Space Center, placing its crew on a trajectory to the Moon, for the first visit to another celestial body by humans.