- Mar 2 Long-distance communication speeds up with the unveiling of a semaphore machine in Paris
- May 3 Constitution of May 3 is proclaimed by the Great Sejm (Parliament) of the Polish-Lithuanian Commonwealth, becoming the 1st modern constitution in Europe
- Nov 26 1st US cabinet meeting, held at George Washington's home in Philadelphia, Pennsylvania. Secretary of State Thomas Jefferson, Secretary of the Treasury Alexander Hamilton, Secretary of War Henry Knox, and Attorney General Edmund Randolph attend.
- Dec 4 Britain's Observer, oldest Sunday newspaper in the world, first published
- Dec 15 US Bill of Rights ratified when Virginia gives its approval, becomes amendments 1-10 of the US constitution
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