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.

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 1800, the parliament and government buildings were being moved to the new capital of Washington D.C. At the same time, Congress decided to establish a library as well.

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

The 1800 presidential election between Thomas Jefferson and John Adams—called the Revolution of 1800—marked a major turning point as power peacefully shifted between political parties for the first …

The 1800s (pronounced "eighteen-hundreds") was a decade of the Gregorian calendar that began on 1 January 1800, and ended on 31 December 1809.