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May Day

(Encyclopedia)May Day, first day of May. Its celebration probably originated in the spring fertility festivals of India and Egypt. The festival of the Roman goddess of spring, Flora, was celebrated from Apr. 28 to ...

John Day

(Encyclopedia)John Day, river, 281 mi (452 km) long, rising in several branches in the Strawberry Mts., NE Oreg., and flowing W, then N to the Columbia River. Unnavigable, the river is used to irrigate vegetable fa...

Flag Day

(Encyclopedia)Flag Day, anniversary of the adoption of the American flag in 1777. It is celebrated on June 14 but is not a legal holiday.

Independence Day

(Encyclopedia)Independence Day: see Fourth of July. ...

Judgment Day

(Encyclopedia)Judgment Day or Doomsday, central point of early Christian, Jewish, and Islamic eschatology, sometimes called the Day of the Lord. References to it throughout the Bible are numerous. The Christian bel...

Earth Day

(Encyclopedia)Earth Day, Apr. 22, a day to celebrate the environment. The first Earth Day was organized in 1970 to promote the ideas of ecology, encourage respect for life on earth, and highlight growing concern ov...

Decoration Day

(Encyclopedia)Decoration Day: see Memorial Day. ...

degree-day

(Encyclopedia)degree-day, a unit of measure used to estimate the fuel and power requirements in heating and cooling a building; it is equal to a difference of 1 degree between the outdoor daily average temperature ...

Dominion Day

(Encyclopedia)Dominion Day: see Canada Day.

Day, Benjamin

(Encyclopedia)Day, Benjamin, 1838–1916, American printer; son of Benjamin Henry Day. While working in New York City, Day invented a process, utilizing celluloid sheets, for shading plates in the color printing of...