I use the clock on the nightstand for that. It also tells me when to get up in the morning (sometimes I even listen to it), and I can see it in the dark.
As for watches, I use a pocket watch, having a watch (or anything else, for that matter) on my wrist bugs me.
It would be nice to have a clock on the Reader's screen (if there were one, I'd definitely want the option of turning it off), but I'm not all
that concerned about it, after all, I've somehow managed for years with clockless paper books.
