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A day is measured by how long it takes the
to rotate (turn) once: 24 hours.
The earth is divided into 24 time zones. It takes the sun an hour to cross each zone.
The time zones are marked by imaginary lines called meridians, which run north and south on the globe.
is at Greenwich, England. It is 0° longitude. From here, east and west longitude is calculated for the rest of the globe.
A new day begins at the
international date line
, which is halfway around the world from the prime meridian.
East of the international date line it is 1 day earlier than west of it. Remember, “Go ahead west to the new day, go back east to the old.”
The Names of the Days of the Week
from Fact Monster:
- day day, period of time for the earth to rotate once on its axis. The ordinary day, or solar day, ...
On This Day... ,
- Wednesday, December 22, 2010 This is 356th day of the year and 9 days remain in the year. Hebrew ...
- Day, Benjamin Day, Benjamin, 1838–1916, American printer; son of Benjamin Henry Day. While ...
- Dorothy Day social activist, journalist, and cofounder of the Catholic Worker movement Born: 1897 ...
- Day, Thomas Day, Thomas, 1748–89, English social reformer and author. He supported the ...