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International Date Line
In·ter·na·tion·al Date Line


noun 
Definition:
 
line where the date changes: an internationally agreed imaginary line running roughly along the 180º meridian of longitude, to the east of which the date is one day earlier than to the west
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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