If this is redundant, mea culpa, but it took me some time to figure how to add UTC on an Apple watch. First I put in London, thinking that would work, but they observe daylight saving time, so it's currently one hour off. Here's how: -go to the Clock app on your iPhone, seems most settings on the watch are controlled on the phone, (Yes, the Apple Watch is really an iPhone accessory) and hit "world clock" on the bottom. -Now click the "+" sign on the upper right for a list of cities around the world. -Type in"UTC" at the top and when it show up, select it. Now back on the watch when you're customizing a watch face, the "world time" "UTC" is now an option. That's all.