September 17th is the 260th day of the year (261st in leap years) in the Gregorian calendar. There are 105 days remaining until the end of the year.
1176 – Byzantine–Seljuq wars: The Seljuq Turks prevented the Byzantines from taking the interior of Anatolia at the Battle of Myriokephalon in Phrygia.
1775 – American Revolutionary War: The Continental Army under Richard Montgomery began the Siege of Fort St. Jean in the British province of Quebec.
1859 – Disgruntled with the legal and political structures of the United States, Joshua Norton distributed letters to various newspapers in San Francisco, proclaiming himself Emperor Norton.
1914 – Andrew Fisher, whose previous term as Prime Minister of Australia oversaw a period of reform unmatched in the Commonwealth until the 1940s, became Prime Minister for the third time.
1980 – Solidarity, the Polish trade union, was founded as the first independent labor union in a Soviet-bloc country.
John Ritter would have turned 70
Kyle Chandler turns 53
Anastacia turns 50