Ensure time passes in a simple, peaceful manner with the MoMA Dusk Shade-Changing Wall Clock. Made of two separate disks, this unique wall clock turns as time passes. When the polarized acrylic circles turn, the clock darkens and lightens. And because this happens along with the passing of the hours, this simple wall clock changes shade relative to the time. In the morning, this acrylic clock is a light, transparent grey shade that’s ready for the day to begin. At night, the Dusk clock is a dark, opaque black to encourage sleep and rest. This two-handed clock has no numbers to take away from its modern design. The fact that it’s 12 inches in diameter means it’ll stand out on any wall in your home. Finally, it requires just one AA battery to display the time.