Simply move the dots !
Fuzo tells you what time it is here when it is ‘x’ there

A Skype meeting with someone in L.A., a Keynote that starts at 10 a.m in Barcelona or a Pro Surf event that will air live from Fiji...
How many times do we have to make the calculation ? Why didn’t someone just put together a Simple Visual Calculator for Time Zones Conversion ...once and for all ?

Well, here you are:

1 SET THE TIME ZONES
by moving the dots horizontally

2 SET THE HOUR THAT YOU KNOW
by moving the dots vertically

... AND JUST READ THE OTHER CLOCK !