For example, it's seven o'clock in the morning in China, so the Spanish time is minus seven hours, which is midnight 12.
Reason: Although the longitude range of Spain is near 0 meridian, the country adopts the zone of East Zone 1. That is, it is 7 hours different from Beijing time (East Eight Districts).
Time difference: Local time: With the rotation of the earth, the sun rises and sets in the west in a day. The local time when the sun passes through the highest point in the sky is 12, so different meridians have different local times. The same time used in the same time zone is the time zone (local time on the central meridian of this area), and the same time used around the world is universal time (local time on the meridian of 0 degrees).
Time zone: Time zones are defined by using the same time in different parts of the world. 1884 When the International Longitude Conference was held in Washington, D.C., in order to overcome the time confusion, it was stipulated that the world was divided into 24 time zones.
In China, the use time of Dongba District, where the capital Beijing is located, is the national unified use time.
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