A line of longitude generally 180 degrees east and west of the prime meridian. The date is one day earlier to the east of the line.
an imaginary line on the surface of the earth following (approximately) the 180th meridian
Lower branch of the meridian passing through Greenwich; requires advancing a clock twenty four hours in crossing from W to E, or retarding it twenty four hours in crossing E to W.
roughly follows the meridian at 180° longitude. This is the line that separates today from tomorrow. When it is Saturday in New Zealand, it is still Friday in Hawaii. This is because New Zealand is twelve hours ahead of Greenwich Mean Time, and Hawaii is eleven hours behind GMT. (See time zone.)
imaginary line representing maximum longitude (180º), also where day of the week is switched as a person travels across the international date line
The International Date Line (IDL) is an imaginary north-south line (at the 180th meridian), in the Pacific Ocean, at which the date changes. The east side of the IDL is a calendar day earlier than the west side. The actual IDL used is not a straight line, but zigzags around certain populated areas.
The line, running mostly along 180° East/West longitude, to the east of which the calendar date is one day earlier than to the west.
The longitudinal line that runs through the Pacific Ocean where the day begins; 180 degrees longitude.
An imaginary line of longitude generally 180ø east or west of the prime meridian. The date becomes one day earlier to the east of the line.
The line of longitude located at 180° East or West (with a few local deviations) where the date changes by a day. West of the line it is one day later than east of the line.
