Back in the nineties I used to work for a relational db vendor. As some sort of morale thing they used to give us all sorts of logo merch, most of which I gave away to homeless people. One thing I kept was a logo watch. Even though it was a five buck Chinese quartz cheapie it was kind of cool looking despite the logo.
Anyway, after a while I noticed a strange thing. Between the hours of 8:00am and 5:00pm it would run slow, but between 5:00pm and 8:00am it would run fast.
How the hell did they do that???