Wikipedia:Selected anniversaries/September 17
This is a list of selected September 17 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.
September 17: Yom Kippur begins at sunset (Judaism, 2010); Constitution Day in the United States.
- 1176 – Byzantine–Seljuk wars: The Seljuk Turks prevented the Byzantines from taking the interior of Anatolia at the Battle of Myriokephalon in Phrygia.
- 1787 – The text of the United States Constitution was finalized at the Constitutional Convention in Philadelphia.
- 1894 – The Imperial Japanese Navy defeated the Beiyang Fleet of Qing China in the Battle of the Yalu River at the mouth of the Yalu River in Korea Bay, the largest naval engagement of the First Sino-Japanese War.
- 1916 – World War I: Manfred von Richthofen ("The Red Baron"), a flying ace of the German Luftstreitkräfte, won his first aerial combat near Cambrai, France.
- 1939 – World War II: The Soviet Union invaded Poland from the east, sixteen days after Nazi Germany's attack on that country from the west.
- 1978 – President Anwar Al Sadat of Egypt and Prime Minister Menachem Begin of Israel (pictured with U.S. President Jimmy Carter) signed the Camp David Accords after twelve days of secret negotiations at Camp David.