The conversation between human and AI assistant.
As the earth is sphere how can we say the first sun rises in Japan?
That makes sense. How do time zones work, though? And how were they established?
Time zones were established based on the rotation of the Earth and the concept of 24 hours in a day. The Earth rotates 360 degrees in a 24-hour period, meaning it rotates 15 degrees every hour. So, time zones are divided into 24 sections, each 15 degrees wide, with a standard time for each zone based on its longitudinal position. This system was formally proposed in the late 1800s and was gradually adopted worldwide.