Wikipedia:Selected anniversaries/May 22

This is a list of selected May 22 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.

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; Unity Day in Yemen (1990) stub
1455 – Forces led by Richard, Duke of York, and Richard, Earl of Warwick, captured Lancastrian King Henry VI of England, beginning the Wars of the Roses with a Yorkist victory in the First Battle of St Albans. refimprove section
1809War of the Fifth Coalition: Austrian forces under Archduke Charles prevented Napoleon and his French troops from crossing the Danube near Vienna at the Battle of Aspern-Essling. refimprove
1863American Civil War: Union forces began to lay siege to the Confederate-controlled town of Port Hudson, Louisiana. refimprove section
1915 – Five trains were involved in the United Kingdom's deadliest train crash near Gretna Green, Scotland, killing 227 people and injuring 246 others. refimprove section
1942United Steelworkers, the largest industrial labor union in North America, was formed. unreferenced section
1945 – The United States Army formed a plan to evacuate German scientists and engineers to help in the development of rocket technology. refimprove
1964 – During a speech at the University of Michigan, U.S. president Lyndon B. Johnson presented the goals of his Great Society domestic social reforms to eliminate poverty and racial injustice. missing page numbers
1990 – The Yemen Arab Republic and the People's Democratic Republic of Yemen merged to become the Republic of Yemen. refimprove section
2003 – Swedish golfer Annika Sörenstam became the first woman to play in a PGA Tour event in 58 years. refimprove section



May 22: International Day for Biological Diversity; International Quds Day (2020); Jerusalem Day in Israel (2020)

Blackwall Tunnel under construction
Blackwall Tunnel under construction
More anniversaries: