How did the world's countries solve the problem that mean solar time varies continuously as a traveler's longitude changes?
A) they outlawed traveling long distances
B) they offered a reward and thus helped spur the invention of clocks and watches that can change the time they keep as you change longitude
C) an international convention adopted a single time zone for the entire world, so we can all be on the same time
D) the world was divided into 24 time zones, with all communities within a time zone keeping the same mean standard time
E) you can't fool me, this problem has not been solved yet

Question

Quizplus · Accepted Answer

The world was divided into 24 time zones, each 15 degrees of longitude wide, with all communities within a time zone keeping the same mean standard time. This system was adopted in 1884 at the International Meridian Conference in Washington D.C. and is still in use today.

How Did the World's Countries Solve the Problem That Mean