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Because some countries, islands and states do not want to be divided into several zones, the zones' boundaries tend to wander considerably from straight north-south lines. The international dateline was drawn to generally follow the 180 meridian in the Pacific Ocean. The 24 standard meridians, every 15 east and west of 0 at Greenwich, England, were designated the centers of the zones. C., applied the same procedure to zones all around the world. On November 1, 1884, the International Meridian Conference in Washington, D. At noon, on November 18, 1883, telegraph lines transmitted GMT time to major cities where authorities adjusted their clocks to their zone's proper time. That year, the United States was divided into four time zones roughly centered on the 75th, 90th, 105th, and 120th meridians. Until 1883 most railway companies relied on some 100 different, but consistent, time zones. The problem of keeping track of over 300 local times was overcome by establishing railroad time zones.
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Until the 1860s most cities relied upon their own local “sun” time, but this time changed by approximately one minute for every 12 miles traveled east or west. Time zones did not become necessary in the United States until trains made it possible to travel hundreds of miles in a day. World Time Zone Map Australia Time Zone Map Canada Time Zone Map EU Time Zone Map US Time Zone Map. Need some help World time and date for cities in all time zones. Current world time - check current time in more than 550 cities around the world at the Directory of World Time. UTC is Coordinated Universal Time, GMT is Greenwich Mean Time. For example, if it is one o’clock in the afternoon in London, England, United Kingdom, it is 6:30 pm in New Delhi, Delhi, India (+5.50), and 5:00 am in Los Angeles, California, United States (-8.00).Source: National Institute of Standards and Technology Physics Laboratory UTC (GMT/Zulu)-time: Wednesday, Februat 04:57:16. The hours added or subtracted from the time in Greenwich are marked on the map. This map layer shows the 24 time zones commonly used in the Greenwich Mean Time model. For example, China, a very large country, only uses one time zone while many places in the Middle East use half-hour time zones. However, at the conference, the committee decided that the world should identify an official meridian and they chose the Greenwich Meridian.Īlthough much has changed since the conference in 1884, Fleming’s design has stayed intact with variations based on political and geographic decisions.
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Previously, different countries had different prime meridians. Longitude lines mark the distance east or west of the prime meridian.įleming’s recommendations led to an international conference held in 1884 to select a common prime meridian, otherwise known as zero degrees longitude, on which to base time zones. He proposed to regulate time by dividing the earth into 24 one-hour time zones utilizing longitude lines, each 15 degrees apart. To prevent further damage, Canadian railway engineer Sir Sanford Fleming devised a globally standardized time system. Many towns used natural time markers so whenever they saw the sun highest in the sky, that was their “high noon.” This caused confusion and some collisions amongst trains as no one was following the same local time. Each town and city went by their own time which was usually regulated by a clock in the town center. Time standardization was greatly needed in a world becoming increasingly interconnected.įor example, in the United States, the railroad system faced big problems by the late 1800s. New technology and more accessible transportation, such as trains, allowed people, ideas, and goods to travel faster and more easily around the world. In the late 19th century and into the early 20th century, the world globalized.