On This Day in History September 17 ​Historical Events​ ​1683 Dutch scientist Antonie van Leeuwenhoek is the first to report the existence of bacteria Page one of the original copy of the Constitution of the United States ​1787 US Constitution is signed by delegates at the Philadelphia Convention ​1862 Battle of Antietam [Battle of Sharpsburg]: Bloodiest day in the American Civil War with 22,000 dead, wounded, or missing in the first major battle on Union soil ​1916 World War I flying ace, The Red Baron of the German Luftstreitkräfte, wins his first aerial combat near Cambrai, France ​1940 Adolf Hitler indefinitely postpones Operation Sealion, the planned German invasion of Great Britain ​1978 Anwar Sadat, Menachem Begin, and Jimmy Carter sign the Camp David Accords, frameworks for peace in the Middle East and between Egypt and Israel More Historical Events Fun Facts Sponsored by BrainFm Ready to Unlock Peak Focus? Brain.fm is music made in collaboration with neuroscientists, to help high performers sharpen their edge. Whether you're coding, creating, or crushing your to-do list, scientifically-optimized audio can help you find your flow state faster and stay there longer. It’s what elite minds use to go from focused... to unstoppable. → Improve productivity, block out distractions → Categories for deep work, creativity, learning, and more → ADHD mode for brains that need extra stimulation → Try it free for 14 days and unlock your next level Try it now and get focused in minutes! ​Famous Birthdays​ ​Marquis de Condorcet​ ​1743 - 1794 ​Hank Williams​ ​1923 - 1953 ​Phil Jackson​ ​80th Birthday ​Narendra Modi​ ​75th Birthday Also Friedrich Wilhelm von Steuben and Patrick Mahomes (30) More Famous Birthdays Celebrity Birthdays ​Famous Deaths​ ​Anastasio Somoza Debayle​ ​1925 - 1980 ​Karl Popper​ ​1902 - 1994 More Famous Deaths Recent Deaths ​The Diary of a Dead Officer​ Mud and blood were features of the First World War trenches, and soldier Arthur Graeme West’s vivid descriptions of it all were captured in his diaries. A Dispatch from the Trenches Weekly Quiz for September 16 - 22