October 30: Devil's Night in Detroit, USA
- 1470 - Richard Neville, the Earl of Warwick, restored Henry VI as the King of England during the Wars of the Roses.
- 1831 - African American slave Nat Turner was captured after leading a brutally suppressed slave rebellion.
- 1905 - Russian Revolution: Tsar Nicholas II reluctantly signed the "October Manifesto", establishing the State Duma as the elected legislature in Imperial Russia.
- 1938 - The radio drama The War of the Worlds frightened many listeners in the United States into believing that an actual Martian invasion was in progress.
- 1961 - The Soviet hydrogen bomb Tsar Bomba (pictured) was detonated over Novaya Zemlya Island in the Arctic Sea as a test; with a yield of around 50 megatons, it was the largest nuclear weapon ever detonated.
Recent days: October 29 - October 28 - October 27
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