Definition of Date Line in US English:

Date Line

(also International Date Line)

proper noun

  • An imaginary north–south line through the Pacific Ocean, adopted in 1884, to the east of which the date is a day earlier than it is to the west. It lies chiefly along the meridian furthest from Greenwich, England (i.e., longitude 180°), with diversions to pass around some island groups.


Date Line

/ˈdeɪt ˌlaɪn/