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World Time Zones Map

World Time Zone map displays the standard time zones around the world.

World Time Zone Map
Description : Time zone map represents the different time zones of the World. Click here to view even larger World Time Zone Map Image. Disclaimer

Time zones were created in order to standardize the time of day around the world, because of the Earth's rotation.
Before time zones and clocks, the sundial was used to keep local solar time, which varied throughout the year, depending on the season and by longitude. Each city kept its own local standard time based on longitude.

With globalization, there came an increasing need for the standardization of time zones, particularly for transportation (namely railways) and communications across longitudes. While mariners began developing a system for tracking time zones, the concept flourished in the 1800s, when railroads became a popular mode of transportation.

Various methods for standardized time zone system were proposed throughout the mid-nineteenth century, which divided the United States into several time zones, each an hour apart. The worldwide system was proposed by Sandford Fleming in 1879, which divided the earth into 24 time zones, beginning at Greenwich, the 180th meridian, and each 15° apart.

Today, these world time zones are followed as shown on the map above. Most countries follow the hourly deviations, though they do not always align with longitudes for convenience, in order to incorporate the entire country. Some countries, including India and Iran, use half-hour deviations instead, and some choose to use just one time zone for the entire country, like China.

Last Updated On : July 22, 2015

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