My watch needed a new battery just before going away for weeks around 6-7 years ago, so I thought I'd sort it when I got back. I suppose I got used to not wearing it that I forgot all about the battery when we got back. In fact it was several weeks until I gave it another thought.
If you look around, there is probably always a clock of some description in sight. Sat at my desk, I can see one on the wall, the one on my monitor and my phone is less than a foot away. When I'm driving, there are 3 in my car, so I'm never short of a means of telling the time.