The appearance of time zones of our planet was due to the banal convenience of communication and the separation of different countries and cities in accordance with the real time of the day. Scientists divided the entire surface of the Earth into 24 time zones, while taking into account the gap of 15 degrees longitude. The same time is considered to be within the same time zone.
Instruction manual
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The decision on calculating time zones was made at the International Conference in 1884. A year earlier, the meridian passing through the Greenwich Observatory near London began to be considered the point of time. It was this observatory that became the unifying link. It was originally built by order of King Charles II for sailors.
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It is worth noting that Russia first switched to standard time in 1919, and at first it was used only for shipping, so that it was convenient for sailors to calculate geographical coordinates. But after 5 years, absolutely everyone began to use this type of time. There are 42 time zones in the world.
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According to 2010 data, there were 9 time zones in Russia, although before that there were as many as 11 time zones. It’s just that some regions switched to another time zone, for example, Udmurtia and Samara Region preferred Moscow time, or rather, the second time zone, which, by the way, does not correspond at all to the natural time of these latitudes. However, this decision made it possible to simplify the whole hourly situation in a large country, because now the maximum spread has been reduced from 10 to 9 hours.
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All boundaries of the time zone are drawn with detailed intelligibility, namely with the division into physical and geographical features. That is, large rivers, interstate borders, administrative borders and even land features are taken into account. There are some designations of time zones, in particular, the plus sign denotes the eastern region, but the minus sign - the western one.
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It is customary to consider the countries of Europe as the zero belt, and more precisely, these are France, Belgium, Spain, Portugal.
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The first time zone includes: Sweden, Denmark, Austria, Yugoslavia. The second time zone covers the European part of Russia, as well as Romania, Bulgaria, Turkey.
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The third time zone, for example, includes Iraq and Israel. The fourth time zone runs along the Bashkir Autonomous Republic, Afghanistan and Oman. Enumerate the composition of time zones can be infinitely long, since they contain many countries, states, republics.
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In addition to time zones, there is a certain tradition of moving the time one hour forward or backward depending on the time of year. In the summer, it is customary to move the clock hands forward one hour, and in winter - back one hour. Daylight saving time was set an hour ahead, as daylight hours were increasing, and people could save, for example, on lighting.
