Columbia Encyclopedia

(Encyclopedia) O'Connor, Sandra Day, 1930–2023, U.S. lawyer and associate justice of the U.S. Supreme Court (1981–2006), b. El Paso, Tex. Graduating from Stanford ...

(Encyclopedia) John Day Dam, 219 ft (67 m) high and 5,640 ft (1,719 m) long, on the Columbia River between Oregon and Wash.; built between 1959 and 1968 by the U.S. Army Corps of Engineers. It is an extremely large ...

(Encyclopedia) New Economic Policy (NEP), official economic reconstruction program of the USSR from 1921 to 1928. It replaced the economic policies of “war Communism” (1918–21), an emergency program establishe...

(Encyclopedia) French Revolutionary calendar, the official calendar of France, Nov. 24, 1793–Dec. 31, 1805. Its introduction was decreed by the Convention on Oct. 5, 1793, but it was computed from Sept. 22, 1792, ...

(Encyclopedia) Saint Valentine's Day, Western European Christian holiday, originally the Roman feast of Lupercalia. It was christianized in memory of the martyrdom of St. Valentine in a.d. 270, who, in medieval time...

(Encyclopedia) universal time (UT), the international time standard common to every place in the world, it nominally reflects the mean solar time along the earth's prime meridian (renumbered to equate to civil time)...

(Encyclopedia) Papua New Guinea păpˈo͞oə, –yo͞oə, gĭnˈē [key], officially Independent State of Papua New Guinea, independent Commonwealth nation (2015 est. pop. 6,672,000), 183,540 sq mi (475,369 sq km), ...

(Encyclopedia) Janus jāˈnəs [key], in Roman religion, god of beginnings. He was one of the principal Roman gods, the custodian of the universe. The first hour of the day, the first day of the month, the first mon...

(Encyclopedia) Manhattan, borough (1990 pop. 1,487,536), 28 sq mi (57 sq km), New York City, SE N.Y., coextensive with New York co. Manhattan is the cultural and commercial heart of the city, and its dramatic skylin...

(Encyclopedia) Tet offensive, 1968, a series of crucial battles in the Vietnam War. On Jan. 31, 1968, the first day of the celebration of the lunar new year, Vietnam's most important holiday, the Vietnamese Communis...