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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Jul 2, 2025 · Thomas Jefferson defeated the incumbent President, John Adams, in the 1800 Presidential Election. Despite controversy, the election marked the peaceful transfer of power …

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.

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 …

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 …

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

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 …

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 …