As of the start of 1800, the Gregorian calendar was 11 days ahead of the Julian calendar, which remained in localized use until 1923.

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Historical events from year 1800. Learn about 37 famous, scandalous and important events that happened in 1800 or search by date or keyword.

On June 3, 1800, John Adams, the second president of the United States, arrives in Washington, D.C., where he briefly takes up residence in Georgetown and is fêted in advance of being the first...

May 2, 2025 · October 16, 1859: Abolitionist John Brown (1800–1859) leads a raid on Harpers Ferry, Virginia, hoping to initiate a revolt of enslaved people. This revolt would put the U.S. on the path to war.

In the early 1800s, the world witnessed significant changes and events that shaped the course of history. The Industrial Revolution was in full swing, transforming societies from agrarian-based …

United Kingdom of Great Britain and Ireland established with one monarch and one parliament; Catholics excluded from voting. Agreement bearing Napoleon's signature.

What happened in the year 1800 in history? Famous historical events that shook and changed the world. Discover events in 1800.

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