00:00You probably know that the Earth is divided into 24 time zones, but why do they look so weird?
00:06You see, time starts at the prime meridian Greenwich, or 0 UTC, Coordinated Universal Time.
00:12All zones east of Greenwich have positive offsets, while those to the west have negative offsets.
00:18So, when you were in Los Angeles, you were in the UTC-8 time zone.
00:23But if the time zones remained perfectly straight, there would be a number of inconveniences.
00:27For example, in Phoenix, one part of the city would be in UTC-7 and another in minus 8, creating a one-hour difference and significant confusion.
00:36For this reason, it was decided to change the time zone boundaries based on the borders of countries and regions.
00:42The country with the largest number of time zones is France.
00:45Thanks to its numerous overseas departments, it covers 12 time zones.
00:49At the same time, a giant like China technically covers five time zones, but decided to use only one for the whole country.
00:56As a result, western cities like Kashgar are still dark at 10 a.m.
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