When was it decided that adding a clock was good UX for everything? Sitting here in my office, I can see a clock on my desktop, a clock on my iPod, a clock on my phone, and an actual clockwork clock on the wall.
At home, there's a clock on my TV, on my microwave, my hi-fi, my DVD player, set-top box... (please don't burgle me). Since I always unplug these things, they always blink midnight; which raises an interesting question about clocks vs eco usage guidance.
There is a clock on my car's dashboard and its radio. That's just silly, really.
There's old clocks atop spires and towers in town (fair enough, historically useful), and more, new clocks decorating half the shops and buildings closer to the ground.
Why are clocks so ubiquitous? They're certainty useful, I'm not sure they're so useful that I can turn 360 degrees and get the time 4 times to a five-minute degree of error. Do we have to keep an eye on it incase it stops? Will it start going backwards if everyone stops paying attention?
So why is adding a clock seen as a good UX addition in so many varying situations?