Spain, located at the junction of Europe and Africa, implements the Eastern Time Zone and now implements daylight saving time.
China is located in the east of Asia, on the west coast of the Pacific Ocean, and in the time zone of the East Eighth District.
Formal time zone division, including 24 time zones, each time zone is represented by an English letter. Every longitude 15 minutes has a time zone, with one exception, and each time zone has a central meridian; For example, GMT belongs to the "Z" area, so the suffix "Z" is usually added after its time (the suffix "Zulu" is used in spoken language).
Method for divide extended data time zone
The earth rotates from west to east, and the sun appears earlier in the east than in the west, and the time in the east is earlier than in the west. The difference between eastern time and western time is not only calculated in hours, but also in minutes and seconds, which brings inconvenience to people.
In order to overcome the time confusion, an international longitude conference (also known as the International Meridian Conference) held in Washington in 1884 stipulated that the world should be divided into 24 time zones (East 12 time zone and West 12 time zone).
Britain (the former site of Greenwich Observatory) is defined as the central time zone (zero time zone), East 1- 12 and West 1- 12. Each time zone spans longitude 15 degrees and the time is exactly 1 hour. The last east-west zone 12 spans longitude 7.5 degrees respectively, and is bounded by east-west longitude 180 degrees. The time on the central meridian of each time zone is the time uniformly adopted in this time zone, which is called time zone. The time difference between two adjacent time zones is 1 hour.
For example, the time of China East Zone 8 is always 1 hour earlier than Thailand East Zone 7 and 1 hour later than Japanese East Zone 9. Therefore, people who travel abroad must adjust their watches at any time to keep up with local time. Every time you go west, you should set your watch back to 1 hour (for example, from 2 o'clock to 1).
Set your watch forward 1 hour every time you go east (for example, from 1 to 2 o'clock). It is also stipulated that Britain (the former site of Greenwich Observatory) is the prime meridian, that is, the zero meridian.
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