Since the Earth is a sphere (ball-shaped), you can leave LA in any direction
and eventually wind up at the IDL. But the shortest way to reach it is by
heading out from LA toward the northwest. That way, the trip is only
3,239 miles .
The Prime Meridian and the Internation Date Line
Traveling west across the date line.
You will cross the International Date Line when flying from Tokyo to Los Angeles. This means you will lose a day and arrive in Los Angeles on the same day you departed Tokyo.
east-bound
Las Vegas is approximately 116 degrees west of the International Date Line, which lies at 180 degrees longitude. Therefore, there are about 64 degrees of longitude separating Las Vegas from the International Date Line.
1/2 of the earth's surface, in each direction.
If you cross the International Date Line in the right direction, you can have a 48 hour birthday!
You either gain or lose a day - depending on which direction you're travelling.
the international date line was called International date line because it is a line that cut the globle into two that is W and E.Answer:When travellers first circumnavigated the world they found that they had "added" a day to their logs (Everybody at home thought it was Sunday when their logs said it should be Monday). This was due to their traveling West against the Earth's rotation. To correct for this their was an agreement what when travellers crossed a line in the middle of the Pacific (where it didn't matter) they would adjust their calenders. As everyone agreed to this the "dateline" was "internationally" accepted. It was convenient to make the the Date Line opposite the Prime Meridian
the international date line
That depends on where you're coming from to go to Shanghai. No wait ! On second thought, it doesn't even depend on that. No matter where you're starting from, you can travel in either one of two opposite directions and wind up in Shanghai. That's because the Earth is spherical (shaped like a ball). So . . . -- Regardless of where you are when you start out, you always have a choice of two directions for your trip to Shanghai. -- One direction is a longer trip, and the other direction is a shorter one. -- In one direction, you'll cross the International Dateline on your way to Shanghai. In the other direction, you won't.
180 degrees, in either the east or west direction, at any latitude.