Meaning of DAY in English



Time required for a celestial body to turn once on its axis; especially, the period of the Earth's rotation.

The sidereal day (see sidereal period ) is the time required for the Earth to rotate once relative to the background of the stars (i.e., the time between two observed passages of a star over the same meridian of longitude). The apparent solar day is the time between two successive transits of the Sun over the same meridian. Because the orbital motion of the Earth makes the Sun seem to move slightly eastward each day relative to the stars, the solar day is about four minutes longer than the sidereal day. The mean solar day is the average value of the solar day, which changes slightly in length during the year as the Earth's speed in its orbit varies.


[c mediumvioletred] (as used in expressions)

All Saints' Day

All Souls' Day

April Fools' Day

All Fools' Day

Canada Day

Dominion Day

D Day

Day Doris

Day Dorothy

Day Lewis Cecil

Groundhog Day

Hershey Alfred Day

Independence Day

John Day Fossil Beds National Monument

Judgment Day of

Labor Day

May Day

Memorial Day

Decoration Day

Mother's Day and Father's Day

New Year's Day

O'Connor Sandra Day

Sandra Day

Saint Bartholomew's Day Massacre of

Six Day War

Thanksgiving Day

Valentine's Day

Veterans Day

Day of Atonement

Reorganized Church of Jesus Christ of Latter Day Saints

{{link=Holocaust Remembrance days">Holocaust Remembrance days

Hundred Days

July Days

June Days

Seven Days' Battles

Britannica English dictionary.      Английский словарь Британика.