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
Maryland Route 180 MD 180 was extended south over the length of MD 78 (Ballenger Creek Pike) toward Adamstown in 1970, forming a cane-shaped route. MD 180 was retracted to the US 340 interchange in 1989 when MD 351 was assigned to what had been MD 78. That same year, Keep Tryst Road was removed from the state highway system, leaving behind the stub that is current MD 180A. In 2002, MD 180 was extended east along Ballenger Creek Pike to Ballenger Center Parkway at the same time MD 351 was temporarily transferred to county maintenance south of its ramp to eastbound I-70.