On the conversion of time zones

1, this question is difficult to answer, because it is not the same day from 12 west to 1 west. Time in the world is based on the intermediate time zone, which is the prime meridian. For example, London is at 3: 00 a.m. on May 1 Sunday, so other time zones will take this as the standard, increasing eastward and decreasing westward. The time for West Zone 2 is 0: 00 am on May 1 Sunday, the time for West Zone 3 is 0: 00 am on May 1 Sunday and the time for West Zone 4 is 23: 00 pm on April 30th. That is to say, if the time is not reduced enough while decreasing westward, then the date will be reduced by one day and the time will become 24: 00 pm, which is the handover point of the daily cycle. Actually, 24: 00 pm on April 30th is 0:00 am on May 1 Sunday. What I said is more popular, which is different from what the book says. You also said not to be long-winded.

As I said above, obviously, no!

3. Yes! This is another explanation. When calculating the time zone, you need to add and subtract dates as long as you cross the date line. If you cross from west to east, that is, cross east, the date will increase by one day, and vice versa. For example, the west 1 1 zone is 5:00 a.m. on May 1 day, then the time in the east 1 1 zone is 3:00 a.m. (every two time zones, westward, minus 2), and the date is added by one day, May 2.

I can't see clearly what you are asking. I can only tell you the twists and turns of the date line. The date line is artificially drawn, and the twists and turns are to better unify the time in the same area. I think you may want to ask what is the difference between coincidence and non-coincidence with the central line of the East and West 12 districts. In that case, it's the same.

5. As I said above, I should refer to 1 and 3 questions to understand.

6. The difference in dates is due to the shape of the earth's sphere, its rotation and revolution, so that half of the earth is not illuminated by sunlight. Rotation and revolution make the illuminated place of the earth change constantly, resulting in the difference between day and night, so there is a time difference. We artificially divide the earth into 24 time zones. After the earth rotates once, the date is reduced by one day, so there is a date difference. This question may not be very good. I can't find the information at the moment, so I have to say it first.