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 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.
Images
Use only ONE image at a time
-
Flag of Cape Verde -
Jan III Sobieski, King of Poland -
King Jan III Sobieski of Poland near Vienna -
Gustav Mahler -
Süleyman Demirel -
Mae Jemison
Ineligible
| Blurb | Reason |
|---|---|
| {{<!--If next year is a leap year-->#ifexpr:{{IsLeapYear| {{CURRENTYEAR}} +1}}| New Year's Day in the Coptic and the Ethiopian calendars ( 2024);}} | Coptic: refimprove; Ethiopian: no footnotes |
| 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. | refimprove section |
| 1942 – A U-boat sank RMS Laconia with a torpedo off the coast of West Africa and attempted to rescue the passengers, which included some 80 civilians, 160 Polish and 268 British soldiers and about 1800 Italian POWs. | Tagged with {{ refimprove}} |
| 1977 – South African anti- apartheid activist Steve Biko was killed in police custody. | Tagged with {{ prune}} |
| 1990 – The Two Plus Four Agreement was signed in Moscow, paving the way for German reunification. | refimprove |
| 1992 – Abimael Guzmán, leader of the Peruvian Maoist guerrilla organization Shining Path, was captured in Lima. | unreferenced section |
Eligible
- 490 BC – Greco-Persian Wars: Athenians and their Plataean allies turned back the first Persian invasion of Greece in the Battle of Marathon.
- 1609 – While sailing aboard the Halve Maen, Englishman Henry Hudson began his exploration of the Hudson River, laying the foundation for Dutch colonization of present-day New York.
- 1848 – Switzerland became a federal state with the adoption of a new constitution.
- 1980 – The Turkish Armed Forces ousted Prime Minister Süleyman Demirel and would rule the country for three years before democracy was restored.
- 1983 – The clandestine group Boricua Popular Army staged a bank robbery in West Hartford, Connecticut, US, making off with $7 million in the largest cash theft in U.S. history at the time.
- 1992 – Aboard Space Shuttle Endeavour, American Mae Jemison became the first black woman in space.
- 2007 – Former Philippine president Joseph Estrada was convicted of plunder and sentenced to reclusión perpetua.
Notes
- Battle of Baltimore appears on September 13, so Battle of North Point should not appear in the same year
September 12: Paryushana begins ( Svetambar Jains, 2012); National Day in Cape Verde
- 1814 – War of 1812: Although the Maryland Militia lost the Battle of North Point, they delayed the British advance against Baltimore, buying time for the defense of the city.
- 1910 – Gustav Mahler's Symphony No. 8, one of the largest-scale choral works in the classical concert repertoire, was first performed in Munich.
- 1933 – Hungarian-American physicist Leó Szilárd (pictured) conceived of the idea of the nuclear chain reaction while waiting for a traffic light in Bloomsbury, London.
- 1940 – Four teenagers discovered the Lascaux caves near Montignac, in the Dordogne département of France, containing cave paintings that are estimated to be 17,300 years old.
- 1942 – World War II: The Imperial Japanese Army began the Battle of Edson's Ridge in an effort to retake Henderson Field on Guadalcanal.
- 1974 – Emperor Haile Selassie I of Ethiopia was deposed by the Derg, a military junta.