where are time zone lines
Home > Time Zones > IDL. The International Date Line (IDL) is an imaginary line of longitude on the Earthâs surface located at about 180 degrees east (or west) of the Greenwich Meridian. The International Date Line on the mapOur interactive Time Zone Map shows the International Date Line. The date line is shown as an uneven black vertical line in the Time Zone Map above and marks the divide where the date changes by one day. It makes some deviations from the 180-degree meridian to avoid dividing countries in two, especially in the Polynesia region.