What is an international international date line?

International international date line is an imaginary line stipulated by 1884 International Longitude Conference.

Define an "international international date line" that is the same and comparable all over the world. With the establishment of the standard time and time zone system, the twelve time zones in the east and west overlap, with the same time and different dates. In order to avoid confusion, Meridian 180 is recognized as an international international date line, because it is an international international date line based on Greenwich Mean Time. This "International international date line" is called "International international date line". ?

This "International international date line" across the Pacific Ocean has avoided some islands and regions for the convenience of local life, so that it will not be divided into two dates. Therefore, it is not a straight line, but a few tortuous curves.

Extended data

"Standard Time Service" has largely solved the chaotic phenomenon of all kinds of time, so that there are only 24 different times in the world, and because the time difference between adjacent time intervals is exactly 1 hour, the conversion of time in different time intervals becomes extremely simple. So this time-sharing system has been used all over the world for one hundred years.

When the time zone system is specified by standard time, there is still a problem:

If you travel around the world from west to east, every time you cross a time zone, you will put your watch forward one hour plus the time it takes to travel, so that when you return to your original place through 24 time zones, your watch will be 24 hours faster than the people around you;

On the contrary, when traveling around the world from east to west, your watch is 24 hours slower than others. (For example, in Mr. jules verne's novel Around the World in Eighty Days, Mr. Fogg traveled around the world from west to east for 24 hours at a faster speed, and almost didn't win 20,000 pounds. In order to avoid this "date confusion" phenomenon, we must solve the problem of date change.

Baidu Encyclopedia-International international date line