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.

← December 20	December 22 →

December 21: December Solstice (23:38 UTC, 2010); Dongzhi, Yalda, Yule, and other winter solstice festivals (Northern Hemisphere, 2010); Midsummer festivities (Southern Hemisphere, 2010)

• 1620 – The Mayflower Pilgrims landed at what is now Plymouth, Massachusetts, US, establishing the Plymouth Colony.

• 1872 – HMS Challenger sailed from Portsmouth, England, on a scientific expedition, making many discoveries that laid the foundation of oceanography.

• 1883 – The Royal Canadian Regiment and The Royal Canadian Dragoons, the oldest regular regiments of the Canadian Army, were both formed.

• 1970 – United States President Richard Nixon met singer Elvis Presley (meeting pictured) in the White House, wherein Presley expressed his patriotism and his contempt for the hippie drug culture.

• 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.

More anniversaries:

• December 20
• December 21
• December 22