Some people are literal while some people are visual. Personally, I could stare at the following picture for hours.
I'm not sure who decided to sit down and doctor up this diagram one day, but it's pretty ingenious considering that we're all running on some type of clock. It gives you a pretty good idea of how all the time zones relate each other. Still, the easiest way is just to use a time zone converter if you're short on time - pun intended.
