Time. It's a fairly simple concept ... except when it isn't. It can get confusing when arranging a time to get with someone in a different time zone in the U.S., much less the world (is that my today ...

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 ...