![]() They are necessary because the Earth is divided into 24 sections each section represents one hour of time. Understanding Time ZonesĪ time zone is a region where the same standard time is observed. This article will help you understand these time zones, how they work, and why they are important for everyday life. In the United States, there are six main time zones. Atomic clocks are operated in groups-for instance, the US National Institute of Standards and Technology operates twenty atomic clocks in Boulder, Colorado-in climate-controlled areas and their times are compared to ensure accuracy.Time zones are regions where the same standard time is used. To alleviate this concern, time is now calculated using atomic clocks such as hydrogen masers and cutting-edge "cesium/caesium fountain" clocks, which will not gain or lose a second of time in 100 million years. While a discrepancy of a few seconds a day made little difference 100 years ago, in the modern era even such a small variation can have a negative impact on sensitive scientific and technical operations. However, as technology progressed, scientists realized that the speed of Earth's rotation is not constant, but fluctuates by fractions of a second at both predictable and unpredictable intervals. When time zones were first introduced, the time was calculated and timekeeping devices were calibrated by measuring the movement of astronomical bodies-particularly the rotation of the Earth. The more correct label for time zones is Coordinated Universal Time, or UTC. The term GMT is often used incorrectly, especially among English speakers, as it technically refers only to the time zone in which Greenwich, England is located (GMT+00:00). Greenwich Mean Time (GMT) compared to Coordinated Universal Time (UTC) For example, the countries of Turkmenistan, Iran, and Oman are geographically positioned in a vertical north-south row, but they adhere to three different time zones (including Iran's custom GMT+03.50). Countries whose territory touches more than one time zone are free to choose which of those time zones they wish to utilize. While the borders between time zones are clearly defined, they are also notably flexible. Time zones are named according to their distance from the longitudinal meridian that passes through Greenwich, England and establishes the GMT+0:00 time zone. GMT divides the world into 26 time zones-one for each hour in the day plus two overlapping extras to accommodate the remote Pacific Island country Kiribati-each running vertically from Earth's north pole to its south pole. Originally developed by British railroads in the 1840s and made a global standard at Washington DC's International Meridian Conference in 1884, Greenwich Mean Time established a universal international standard time system that enabled the coordination of time all around the world. The Importance of Greenwich Mean Time (GMT) Russia - Partial (Far Eastern Federal District and Siberian Federal District).Mongolia - Partial (Eastern Mongolia, Dornod, Ulaanbaatar, and Sukhbaatar). ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |