Where is gmt minus 5

The idea behind multiple time zones is to divide the world into 24 degree slices and set the clocks accordingly in each zone. All of the people in a given zone set their clocks the same way, and each zone is one hour different from the next. In the continental United States there are four time zones click here for a map : Eastern, Central, Mountain and Pacific. When it is noon in the Eastern time zone, it is 11 a. All time zones are measured from a starting point centered at England's Greenwich Observatory.

This point is known as the Greenwich Meridian or the Prime Meridian. When it is noon in the Eastern time zone, it is 5 p. Why is the Greenwich Observatory such a big deal? I had no idea what was going on and what time i had to attend the webinar. Thank God for the various time zone converting websites around the web. Thank you! You might also like March 25, April 18, Jane Morgan.

October 5, For millions of years, people measured time by using natural resources such as the sun or moon. Both ancient people and those from the 18th century used to observe the sun every day in order to find out what time of the day it was. Consequently, the majority of people were well-aware of nature and its wonders. Specifically, when the sun was the highest in the sky, they could tell that it was noon. However, the need for the development of more exact mechanisms for calculating time was becoming more and more necessary.

As a result, in the Middle Ages, there were already some advancements. In fact, in the Middle Ages people used to calculate the time based on Sundials. It was the time when cities started setting their two clocks based on the sun position and as a result, each city had its own time, which was a bit different from others. The time of this period was called Apparent Solar Time. Speaking of history: worldwide time zones were introduced in by Sandford Fleming, a Scottish — Canadian engineer, and inventor.

The country started using a standard time system on November 18, By this time, the majority of the largest railway systems switched to standard time. The new system involved four time zones: Eastern, Central, Mountain, and Pacific.

The clocks were synchronized which made communication and the traveling process between various states easier. But its benefits were becoming more and more obvious. Specifically, using EST was accompanied by plenty of advantages in the fields of travel and communication. In the country declared the official law with the Standard Time Act and the United States started adopting the time zones based on the recommendations of the railroads.

The act also established daylight saving time. Standard Time was quickly spread across the ocean and reached westward in since the Interstate Commerce Commission ICC introduced new principles of time-zone management from railroads.