As of the start of 1821, the Gregorian calendar was 12 days ahead of the Julian calendar, which remained in localized use until 1923.

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Historical events from year 1821. Learn about 45 famous, scandalous and important events that happened in 1821 or search by date or keyword.

On November 16, 1821, Missouri Indian trader William Becknell arrives in Santa Fe, New Mexico, sells his goods at an enormous profit and makes plans to return the next year over the route that...

Feb 27, 2026 · War of Greek Independence, (1821–32), rebellion of Greeks within the Ottoman Empire, a struggle which resulted in the establishment of an independent kingdom of Greece.

Oct 3, 2025 · Uprisings against the Ottomans launched the Greek War of Independence in 1821. The event was a pioneering example of Europe's transition from empires to nation-states.

Jan 8, 2017 · What happened in the year 1821 in history? Famous historical events that shook and changed the world. Discover events in 1821.

Jul 2, 2024 · Key events include the Greek War of Independence, the Monroe Doctrine, and the establishment of new nations in Latin America. This timeline provides a detailed overview of these …

1821 The stability for Europe sought at the Congress of Vienna in 1815 is coming undone. Following Serb rebellions against Ottoman rule in previous years, the Greeks in March rise simultaneously …

Events from the year 1821 in the United States. President: James Monroe (DR-VA) Vice President: Daniel D. Tompkins (DR-NY) Chief Justice: John Marshall (VA) Speaker of the House of …