Question

why is the IDL called a calendar line​

Answer 1

Explanation:

it is located halfway round the world from the prime meridian—the zero degrees longitude established in Greenwich, England, in 1852. The International Date Line functions as a “ line of demarcation ” separating two consecutive calendar dates. When you cross the date line, you become a time traveler of sorts

Answer 2

Answer:

Greenwich,England,in 1852.