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.

United States presidential election of 1800, American presidential election held in 1800, in which Democratic-Republican Thomas Jefferson was elected as the country’s third president after …

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November 1, 1800 - U.S. President John Adams is the first President to live in the White House, then known as the Executive Mansion and sixteen days later, the United States Congress holds its first …

In the election of 1800, the Federalist incumbent John Adams ran against the rising Republican Thomas Jefferson. The extremely partisan and outright nasty campaign failed to provide a clear winner …

Events from the year 1800 in the United States. January 7 – The Virginia General Assembly adopts the Report of 1800, a resolution drafted by James Madison arguing for the sovereignty of the individual …

Jefferson had steadily gathered behind him a great mass of small farmers, shopkeepers and other workers; they asserted themselves in the election of 1800. Jefferson enjoyed extraordinary favor …