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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Oct 18, 2025 · 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 …

May 2, 2025 · For more facts about the 1800s, read on for a decade-by-decade timeline of the 19th century. March 4, 1801: Thomas Jefferson takes his seat as the third U.S. president, …

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

On November 1, 1800, President John Adams, in the last year of his only term as president, moved into the newly constructed President’s House, the original name for what is known …

While the 1800 election was a re-match of the 1796 election, it ushered in a new type of American politics, a two-party republic and acrimonious campaigning behind the scenes and through the …

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What happened and who was famous in 1800? Browse important and historic events, world leaders, famous birthdays and notable deaths from the year 1800.

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 …