In an effort to let you keep track of different timezones easily, design studio Robert Nightingale created a multi-timezone clock called the 'WRLDCLCK.' WRLDCLCK is a minimalist wall-mounted timepiece that's easily customizable. The clock contains multiple hour hands and a single minute hand. Each hour hand is labelled with a different location or person so that you always know what the time is around the world.
Robert Nightingale created the clock in order to remove the need for multiple clocks. Since time is constant and time zones don't change, the design firm was able to make a single clock show the time for multiple locations.
In an effort to bring the concept one step further, Robert Nightingale also designed an accompanying smartphone app. The app mimics the functions of the physical WRLDCLCK to let you bring the versatile timepiece around with you.