Wikipedia:Selected anniversaries/November 21
- 1272 – Edward I (statue pictured) became King of England, succeeding his father Henry III who died five days earlier.
- 1783 – Jean-François Pilâtre de Rozier and François Laurent d'Arlandes made the first successful untethered flight by humans in a hot air balloon, which was constructed by the Montgolfier brothers.
- 1920 – Irish War of Independence: On Bloody Sunday in Dublin, the Irish Republican Army killed more than a dozen British intelligence officers known as the Cairo Gang, and the Auxiliaries of the Royal Irish Constabulary opened fire on players and spectators at a Gaelic football match in Croke Park.
- 1962 – The Sino-Indian War ended after the Chinese People's Liberation Army declared a unilateral ceasefire and withdrew to the prewar Line of Actual Control, returning all the territory they had captured during the conflict.
- 1977 – God Defend New Zealand became New Zealand's second national anthem, on equal standing with God Save the Queen, which had been the traditional one since 1840.
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