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TIME ZONES AND CALCULATION OF TIME
As the Earth rotates on its axis from west to east, it completes one revolution in one day. The sun continuously illuminates the surface of the earth. The time of points located at different geographical longitudes is different from each other, which affects the operation of the economy, the operation of the transport system, and in general
causes inconvenience in all areas. In order to prevent such inconveniences, in 1870, the Canadian railway engineer Sanford Fleming proposed to establish a single time zone around the world. This proposal was first accepted in 1883 in the USA and Canada, and later in 1884 at the International Conference with the participation of representatives of 26 countries.
The territory of Uzbekistan is located in the 4- and 5-hour zones. Long years
Tashkent time and Samarkand time were separated in our republic.
This caused a lot of inconvenience. In the years of independence, by a special decision of the government of the Republic, the entire territory of Uzbekistan was transferred to 4-hour local time. According to the international agreement, the surface of the earth is conventionally divided into 24 hour zones along the meridians (there are 15° in each hour zone).
Within the region, the meridian time passing through the center of this region is accepted
done Time within one time zone is called time zone. The time zone passing through the Greenwich meridian is considered the zero or 24-hour zone, and the calculation of time zones starts from this zone. 7°30′ east of zero zone. and 22°30′ E. the middle of the meridians is the first region, 22°30′ and 37°30′ east. the second region in the middle, then the third, fourth, and so on until the 24-hour region.
Which time zone is new after the time zone is implemented
the important issue of starting the day has been left out. Conditionally, it was agreed that the day begins in the 12th zone from its middle meridian. This meridian is 1800 long. However, the meridian crosses the islands in some places.
In such places, a line deviating from the meridian was drawn on the map. This line from pole to pole is called the date line. The beginning of each day on the globe is counted from this line. The boundary of the date line passes between the islands of Ratmanov and Kruzenshtern (in the Pacific Ocean).