I bought this clock as a gift for my boyfriend who is an officer in the US Air Force. He will be stationed in Japan for two, possibly three year. I want him to be able to keep track of what time it is not only where I live, but where his parents live too, so I bought him this clock. It is exactly what he needed! All he has to do is turn the face of the clock until it is in the appropriate time zone and VWAH LAH! He knows exactly what time it is where I live without have to think about it.