In early January the sun does not rise in Kashgar, in China’s far west, until after 10am. Across the border, in eastern Afghanistan, it rises before 7am. That difference is the greatest jump in time ...

Some countries have multiple time zones by virtue of their size, like Russia, which measures 5,600 miles east to west and boasts 10 time zones in one contiguous country. That's the most time zones in ...