![]() In practice, however, this is a rather simplistic explanation, and things are not always as they seem. This gave birth to time zones, with the Greenwich Meridian becoming the first, or ‘Prime’, time zone in 1884.Īs described above, in theory, each fifteen degrees of longitude moved toward the east corresponds to moving the clock an hour forward. Because of this, the need eventually arose for a better method of timekeeping. The Industrial Revolution was in full swing, and the world was changing almost beyond recognition. However, the latter part of the nineteenth century is well known for the explosion of global trading, and the expansion of communication and transport that inevitably came with this. As well as this, the lack of global (and even national) communications made the need for standard timekeeping irrelevant. ![]() This was not an issue in and of itself at this time because, for the most part, the differences in time between long distances were barely noticeable due to the very long travel times taken to traverse these distances. Not counting local variations, each line of longitude is divided by fifteen degrees as a general rule and depending upon which way one travels, time moves forward or backward one hour for every fifteen degrees of longitude.īefore the late nineteenth century, most towns and cities across the world used to set their local times based on the observance of stars and the Sun. The Earth is loosely divided into 24 regions (time zones) separated by longitude. A time zone is a region with a standard time throughout that is used for all social, commercial and legal purposes within that region.
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