Wikipedia:Selected anniversaries/September 15

This is a list of selected September 15 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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Blurb Reason
International Day of Democracy; empty sections
; Free Money Day doesn't appear to be a thing anymore
, El Salvador, Guatemala, Honduras, and Nicaragua Guatemala: refimprove; El Salvador/Honduras/Nicaragua: refimprove section
668Constans II, Emperor of the Byzantine Empire, was assassinated in his bath. refimprove
1644 – Giovanni Battista Pamphili was elected Pope Innocent X. unreferenced section
1762 – British forces defeated the French at the Battle of Signal Hill in St. John's, Newfoundland, the final and decisive battle of the French and Indian War. needs more footnotes
1830 – During the opening of the Liverpool and Manchester Railway, British Member of Parliament William Huskisson was struck and killed by the steam locomotive Rocket. refimprove
1835 – During the second voyage of HMS Beagle, Charles Darwin reached the Galápagos Islands, where he further developed his theories of evolution. unreferenced section
1944World War II: Following the Greek People's Liberation Army's victory in the Battle of Meligalas, more than 700 prisoners of war and about 50 civilians were massacred. death toll is confused, and figure of 700 is not actually cited
1950 – Korean and American troops landed at Incheon, in an amphibious assault, starting the Battle of Inchon, a decisive United Nations military forces victory during the Korean War. lots of CN tags in one section
Anton Webern (d. 1945) too much uncited


September 15: Independence Day in Costa Rica (1821); Battle of Britain Day in Canada and the United Kingdom (2019)

John Bull locomotive
John Bull

Catherine of Genoa (d. 1510) · Phil Lamason (b. 1918) · Signe Toly Anderson (b. 1941)