World's earliest and latest time difference: one day difference
Time difference refers to the difference between the time of two regions, the time of a region is called local time, local time is with the rotation of the Earth after the sun in a day in the highest point of the sky after a certain place is the local time of this place 12 o'clock, and farther apart will be the time difference of this thing, that the world's earliest time and the latest time in the middle of how long it is separated?