Wikipedia:Selected anniversaries/September 12
This is a list of selected September 12 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, featured list 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.
September 12: Fast of Gedalia (Judaism, 2010); National Grandparents' Day (United States, 2010); National Day in Cape Verde
- 1609 – While sailing aboard the Halve Maen, English explorer Henry Hudson began his exploration of the Hudson River, laying the foundation for Dutch colonization of present-day New York.
- 1683 – Great Turkish War: Polish troops led by John III Sobieski (pictured) joined forces with a Habsburg army to defeat the Ottoman Empire at the Battle of Vienna.
- 1848 – Switzerland became a federal state with the adoption of a new constitution.
- 1940 – Four teenagers discovered the Lascaux caves near Montignac, in the Dordogne département of France, containing cave paintings that are estimated to be 17,000 years old.
- 1974 – Emperor Haile Selassie I of Ethiopia, considered to be the religious symbol for God incarnate among the Rastafari movement, was deposed in a coup d'état by the Derg, a military junta.
- 1992 – Aboard Space Shuttle Endeavour, the 50th mission of the Space Shuttle program, American Mae Carol Jemison became the first Black woman in space.