The railroad companies did it. Before
1883, in the United States, each town in the United States had its own
schedule, since there was no radio or television, the time was decided
by the inhabitants of an area; but this affected the
railways a lot, because they had to print tickets with the schedule, and
it was not possible because each town or area had different schedules. Thus,
in 1883, railroad companies worked together with the government to
establish the Standard Time, which would divide the country into four
time zones: Eastern Standard Time, mountain Time, central Time and
standard pacific Time.
