For most, figuring out what time it is in other parts of the country requires simple addition or subtraction, but once you start jumping over the pond and trying to figure out the time in far off countries, it can be a pain in the ass. The 24 Time Zone Barrel Clock can solve that problem. Rotate the barrel to your desired time zone and the clock will reflect that time. Roll it back to your current time zone after finished to ensure you don't miss Heroes tonight. $74 from the MoMA store.