Why is the international date line located at pacific ocean? When was the decision made for the first time?

Answer 1

This condition prevailed until 1884, when a system of standard time was adopted by the International Meridian Conference. Earth's surface was divided into 24 zones. The standard time of each zone is the mean astronomical time of one of 24 meridians, 15 degrees apart, beginning at the Greenwich, England, meridian and extending east and west around the globe to the International Date Line. (This system was actually put into use a year earlier by the railroad companies of the U.S. and Canada, who, until then, had to contend with some 100 conflicting local sun times observed in terminals across the land.)

Answer 2

Because it's 1 of the most remote locations and would have little effect on people.