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date line

Origin of date line

International Date Line

or date line

a theoretical line following approximately the 180th meridian, the regions to the east of which are counted as being one day earlier in their calendar dates than the regions to the west. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for date line
Historical Examples
  • This would throw out months, weeks and days, local time and the date line.

  • The Sentinel with date line of that day lay tossed in a corner.

    Crooked Trails and Straight William MacLeod Raine
  • Degrees of longitude are numbered east and west, meeting just opposite at 180, which is the date line.

  • Let us start to go around the world from the date line, westward.

  • The date line is fundamentally simple, but is difficult to explain.

  • He bought a New York Times, glancing first of all at the date line.

    Time and Time Again Henry Beam Piper
  • Boone took the missive which bore a South American date line and, after reading it, handed it without comment to Asa.

    The Tempering Charles Neville Buck
  • You are hungry, and you may order the entire bill, from soup to the date line, if you like.

    Castle Craneycrow George Barr McCutcheon
  • Carhart stiffened up, spread it out on his knees, and read the date line.

    The Road Builders Samuel Merwin
  • Willie, because of his proficiency as a chirographer, always wrote the date line in the register.

    Anderson Crow, Detective George Barr McCutcheon
British Dictionary definitions for date line

date line

(often capitals) short for International Date Line

International Date Line

the line approximately following the 180° meridian from Greenwich on the east side of which the date is one day earlier than on the west Also called date line
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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date line in Science
date line
The International Date Line.
International Date Line

An imaginary line on the Earth's surface that is internationally agreed upon as the place where each new calendar day begins. The line extends from the North to the South Pole through the Pacific Ocean, roughly along the 180th meridian. The calendar day to the east of the line is one day earlier than it is to the west of the line. The International Date Line was established at the International Meridian Conference in 1884 in order to standardize time, especially for the purpose of travel.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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