The meridian 15° west of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, Greenland, Iceland, the Atlantic Ocean, Africa, the Southern Ocean, and Antarctica to the South Pole.
Technically -1 hour.......so 9:00am.......but all countries on that line are running on GMT....so it’s same 10:00am there....
Yeah, it is true.... it is a grass.
People migrate to the new lands, populate, build cities, created businesses, trade, settle.