The international date line is an imaginary line that runs north-south across the Pacific Ocean from the North Pole to the South Pole. International Date Line, imaginary line extending between the North Pole and the South Pole and arbitrarily demarcating each calendar day from the next. International Date Line is an imaginary line on the surface of the Earth which demarcates change of a calendar day. Read below to know more about International Date Line . Learn about the origin, evolution, and significance of the International Date Line (IDL), an imaginary line that separates two calendar days. Find out how the IDL follows the 180° meridian and deviates from it in some places, and how it affects time and date across the globe.
