January 27, 1900 (Saturday)
- In Peiping (now Beijing), diplomats for Britain, the United States, France, Germany and Italy sent note to the Chinese Foreign Ministry (the Zongli Yamen) requesting an imperial decree to order the suppression of the Boxers and the Big Sword Society in Shandong and Zhili.
- Despite U.S. President William McKinley's Executive Order that the new American territory be called "Puerto Rico", a Senate Committee voted unanimously to refer to the island legally as "Porto Rico". In addition, the Secretary of the Treasury was authorized to retire the Puerto Rican money in favor of U.S. coinage, at the rate of 60 cents per peso.
- Born: Hyman Rickover, American admiral and "Father of the Nuclear Navy", in Maków Mazowiecki, Poland (d. 1986)
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