This is a list of selected May 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.
Use only ONE image at a time
Blurb | Reason |
---|---|
Navy Day in Chile; | refimprove |
996 – Pope Gregory V crowned Otto III as Holy Roman Emperor. | refimprove section |
1674 – John III Sobieski, elected by the szlachta, became the monarch of the Polish–Lithuanian Commonwealth. | unreferenced section |
1758 – French and Indian War: Ten-year-old Mary Campbell, taken captive from her Pennsylvania home by members of the Native American group Lenape, likely became the first white child to travel to the Connecticut Western Reserve. | refimprove, lead too short |
1879 – War of the Pacific: Two Peruvian ironclads led by Miguel Grau Seminario attempted to lift the blockade of Iquique by Chilean battleships under Arturo Prat at the Battle of Iquique. | refimprove |
1881 – Clara Barton founded the American Red Cross in Washington, D.C. | refimprove section |
1904 – The Fédération Internationale de Football Association, the international sport governing body of association football, was founded in Paris. | refimprove section |
1979 – Riots erupted in San Francisco after former Supervisor Dan White was only sentenced for voluntary manslaughter for the assassinations of Mayor George Moscone and openly gay Supervisor Harvey Milk. | misleading section |
1981 – The Italian government released the membership list of Propaganda Due, an illegal pseudo- Masonic lodge that had been implicated in numerous Italian crimes and mysteries. | refimprove section |
1982 – Falklands War: The United Kingdom began a major amphibious assault on the shores of San Carlos Water. | refimprove |
1996 – Algerian Civil War: The remains of seven French Trappist monks who had been kidnapped in Algeria nearly two months earlier were found. | most important part uses an unreliable source |
2006 – The Montenegrin independence referendum was held in Montenegro, with 55.5 percent of the voters favouring independence from the State Union of Serbia and Montenegro. | refimprove section |
2010 – The Japan Aerospace Exploration Agency launched IKAROS, the first spacecraft to successfully demonstrate solar sail technology in interplanetary space. | featured on December 8 |