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sidereal day

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

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...

Lady Day

(Encyclopedia)Lady Day or Annunciation: see Mary. ...

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...

Day, Dorothy

(Encyclopedia)Day, Dorothy, 1897–1980, American journalist and social activist, b. New York City. After studying at the Univ. of Illinois (1914–16), where she joined the Socialist party, she returned to New Yor...

Day, Thomas

(Encyclopedia)Day, Thomas, 1748–89, English social reformer and author. He supported the American Revolution and the abolition of slavery and was interested in improving the lot of the small farmer. His moralisti...

New Year's Day

(Encyclopedia)New Year's Day, among ancient peoples the first day of the year frequently corresponded to the vernal or autumnal equinox, or to the summer or winter solstice. In the Middle Ages it was celebrated amo...

April Fool's Day

(Encyclopedia)April Fool's Day or All Fool's Day, holiday of uncertain origin, known for practical joking and celebrated on the first of April. Prior to the adoption of the Gregorian calendar in 1564, the date was ...