USA HISTORY

Detailed explanation-1: -In the early days, people had no means of transport. Whenever they had to go somewhere they walked on feet. They used animals to carry their goods.

Detailed explanation-2: -On November 18, 1883, the railroads moved forward with the adoption of four U.S. time zones, an idea that had been proposed 11 years earlier by Charles Dowd, a Yale-educated school principal. The time zones, Eastern, Central, Mountain and Pacific, are still in place today.

Detailed explanation-3: -With the proliferation of railroads, faster travel became possible across many cities and travelers could sometimes arrive at an earlier local time than the one they had left. Due to this lack of time standardization, schedules on the same tracks often could not be coordinated, resulting in collisions.

Detailed explanation-4: -In the 1800s, the three main sources of determining the time were the clock at the center of your town, the railroads, and the sun, but it would not be uncommon for all three to tell you different times. Every city or town had the ability to set its own time so 1:05 PM in your town could be 1:15 the next town over.