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Columbus Day

(Encyclopedia)Columbus Day, holiday commemorating Christopher Columbus's discovery of America. It has been traditionally celebrated on Oct. 12 throughout most of the United States, parts of Canada, and in several o...

sidereal day

(Encyclopedia)sidereal day: see sidereal time. ...

Thanksgiving Day

(Encyclopedia)Thanksgiving Day, national holiday in the United States commemorating the Pilgrims' celebration of the harvest reaped by the Plymouth Colony in 1621, after a winter of great starvation and privation. ...

Valentine's Day

(Encyclopedia)Valentine's Day: see Saint Valentine's Day. ...

Canada Day

(Encyclopedia)Canada Day, formerly Dominion Day, Canadian national holiday, celebrated July 1. It is the anniversary of the uniting in 1867 of Upper and Lower Canada, New Brunswick, and Nova Scotia as the dominion ...

Day of the Dead

(Encyclopedia)Day of the Dead, Span. Día de los Muertos, annual festival in Mexico and other parts of Latin America, commonly on November 1st and 2d. Its ancient Mesoamerican roots now augmented by Christian custo...

Saint Bartholomew's Day, massacre of

(Encyclopedia)Saint Bartholomew's Day, massacre of, murder of French Protestants, or Huguenots, that began in Paris on Aug. 24, 1572. It was preceded, on Aug. 22, by an attempt, ordered by Catherine de' Medici, on ...

Atonement, Day of

(Encyclopedia)Atonement, Day of: see Yom Kippur. ...

Lewis, Cecil Day

(Encyclopedia)Lewis, Cecil Day: see Day Lewis, Cecil. ...

John Day Dam

(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 ...