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English definition of “Date Line”

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Date Line

noun [S]
 
 
( also International Date Line, abbreviation IDL)
an imaginary line on the map of the earth that goes from the North Pole to the South Pole. To the east of this line, the date is one day earlier than to the west of it: Several jets encountered software problems as they crossed the International Date Line.
(Definition of Date Line from the Cambridge Business English Dictionary © Cambridge University Press)
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