Why do we have different time zones in the world? Whats the problem with having a universal time?
The concept of having a time zone comes from a basic desire to always have the local time correspond to the amount of daylight that is available. In short, most people tend to think of the middle of the day, or high noon, as being the time in which the sun is at the highest point in the sky. Obviously, the perception of this state would be different at various points around the world. The sun would appear to be at its highest point at a different time of day in Europe than it would appear to be front and center in the United States. The concept of the time zone helps to accommodate this desire. Times zones are configured based on using an agreed upon starting point. This has been referred to as Greenwich Mean Time, universal time, and Greenwich Meridian time. Since GMT is point zero for calculating times, all time zones are understood as being a certain number of hours ahead or behind this universal time. Taking this as the basic standard, time zones are established into fifteen degree
