October 31 is the 304th day of the year (305th in leap years) in the Gregorian calendar. There are 61 days remaining until the end of the year.
Events：
475 – Romulus Augustulus is proclaimed Western Roman Emperor.
683 – During the Siege of Mecca, the Kaaba catches fire and is burned down.
802 – Empress Irene is deposed and banished to Lesbos. Conspirators place Nikephoros, the minister of finance, on the Byzantine throne.
1517 – Protestant Reformation: Martin Luther posts his 95 Theses on the door of the Castle Church in Wittenberg.
1587 – Leiden University Library opens its doors after its founding in 1575.
1822 – Emperor Agustín de Iturbide attempts to dissolve the Congress of the Mexican Empire.
1861 – American Civil War: Citing failing health, Union General Winfield Scott resigns as Commander of the United States Army.
1863 – The Maori Wars resume as British forces in New Zealand led by General Duncan Cameron begin their Invasion of the Waikato.
1864 – Nevada is admitted as the 36th U.S. state.
1876 – A monster cyclone ravages India, resulting in over 200,000 deaths.
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