But you can set up timezones, so that the difference is minimal when rounded to full hours. The high point of the sun doesn't need to be precisely at 12:00, tha

But you can set up timezones, so that the difference is minimal when rounded to full hours. The high point of the sun doesn't need to be precisely at 12:00, that would be silly, especially as the high point of the sun has a seasonal variation too. But we can keep the difference small.