International Date Line International Date Line The International Date Line (IDL) is an imaginary line of demarcation on the surface of Earth that runs from the North Pole to the South Pole and demarcates the change of one calendar day to the next. It passes through the middle of the Pacific Ocean, roughly following the 180° line of longitude but deviating to pass around some territories and island groups. The IDL is roughly based on the meridian of 180° longitude, roughly down the middle of the Pacific Ocean, and halfway around the world from the Greenwich meridian. In many places, the IDL follows
Maine State Route 180 When highway was first designated, SR 180's southern terminus was at the same location as SR 179's southern terminus at US 1A in Ellsworth. The two roads had a concurrency before SR 180 split towards the west and SR 179 continuing along the east shore of Graham Lake towards Waltham. SR 180 crossed the Union River just downstream of the dam holding back Graham Lake before it curved to the north and follows what is now its current alignment. In 2007, the bridge that carried SR 180 received a failing grade based on an inspection of the bridge. As a