The digital clock in my car audio is half of the year correct and half of the year one hour off, except after replacing battery when it's a random number. The winner are kitchen devices with digital clocks. Recently visited house with high-end kitchen with build in coffee machine, dishwasher, fridge(s), oven, stove - half a dozen digital clocks, every showing different time, all wrong. Satan himself knows and cares what combination of buttons hidden God knows where adjusts these clocks.