Wikipedia:Selected anniversaries/December 1
December 1: Union Day in Romania (1918), World AIDS Day (awareness ribbon pictured).
- 1640 – John IV was declared King of Portugal, resulting in the Portuguese Restoration War with Spain.
- 1824 – The House of Representatives selected John Quincy Adams as the winner of the U.S. presidential election, after none of the candidates received a majority of the total electoral college votes, as dictated by the Twelfth Amendment to the U.S. Constitution,
- 1955 – African-American Civil Rights Movement: Seamstress Rosa Parks was arrested for violating the racial segregation laws of Montgomery, Alabama, after refusing to give up her seat on a public bus to a white man, precipitating the Montgomery Bus Boycott.
- 1959 – Twelve countries signed the Antarctic Treaty, the first arms control agreement established during the Cold War, banning military activity in Antarctica and setting the continent aside as a scientific preserve.
- 1990 – Channel Tunnel workers from the United Kingdom and France met 40 metres (131 ft) beneath the English Channel seabed.
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