Because the longitude of Beijing is about east longitude 120 degrees, it belongs to the East Eighth District. Draw a time zone every 15 degrees from the two boundaries of the zero-time zone to the east and west respectively, and draw 12 time zones to the east and west respectively. The east time zone of 12: 00 coincides with the west time zone of 12: 00. The circumference of the earth is 360 degrees, and the world is divided into 24 time zones. "

Beijing time is not Beijing local time (1 16.4), but local time 120, so local time 120 is about four and a half minutes earlier than Beijing local time. Beijing is named "Beijing time" because it is located in the East Eighth District of the international time zone, which is 8 hours different from Greenwich Mean Time (UTC) (that is, Beijing time = UTC +8 hours). The East Eighth District ranges from East longitude 1 12.5 to 127.5, with east longitude 120 as the center line, extending 7.5 from east to west, with a total width of 15.

Beijing time is the standard time for China to adopt Dongba time zone as the international time zone. "Beijing time" and "Beijing local time" are two concepts. The broadcast location of Beijing Time is not in Beijing, but in Pucheng (East Seventh District), Shaanxi Province.

The headquarters of National Time Service Center of Chinese Academy of Sciences is located in Lintong District, Xi, Shaanxi Province. The Time Service Department (Part II) of the National Time Service Center of Chinese Academy of Sciences is located in pucheng county, Weinan City, Shaanxi Province. Although the two places are in Dongqi District, Beijing time is used uniformly throughout the country, and it is Beijing time, not local time, that is responsible for publishing.

Extended data

Today, the world is divided into 24 time zones. In fact, 1 country or 1 province often spans two or more time zones at the same time. For administrative convenience, 1 country or 1 province are often grouped together. Therefore, the time zone is not strictly divided by the north-south straight line, but by natural conditions.

For example, China is a vast country, spanning almost five time zones. However, for the sake of convenience and simplicity, in fact, only the time zone standard of Dongba is used, which is based on Beijing time.