You're thinking of the International Date Line -- ~180 degrees of longitude -- which is not a straight line, because of politics.
Longitude: E 51° 11' 1.9824"
it uses latitude and longitude
Lines of longitude
The Mercator projection does that.
That is called latitude.
Benson
Use a map that shows longitude and latitude.
The Mercator projection
As childhood shows the man as morning shows the day because good person always shows the good behaviour from the beginning.
absolute if it shows latitude and longitude because it show the exact place in degrees, relative if it shows land marks only....
"The 10 Commandments"
You may not have noticed, but the Earth is turning. So any longitude you name shows any time you want to choose, once every 24 hours. To put it the other way: The place of (12.00 midnight) slithers around over the entire Earth, lining up with every longitude, during a period of 24 hours.