Template:On this day/17 September
- 1382 – Louis the Great's dochter, Mary, is crouned "keeng" o Hungary.
- 1630 – The ceety o Boston, Massachusetts is foondit.
- 1787 – The Unitit States Constitution (picturt) is signed in Philadelphia.
- 1916 – Warld War I: Manfred von Richthofen ("The Reid Baron"), a fleein ace o the German Luftstreitkräfte, wins his first aerial combat near Cambrai, Fraunce.
- 1991 – The first version o the Linux kernel (0.01) is released tae the Internet.