Power Time
Yesterday afternoon when my PC screens went blanks and the UPSes started chiming incessantly, there was one thing I wasn’t worried about: The computers clocks coming back up with the right time. I’m pretty sure that even if the computer didn’t have the battery inside to keep the clock up to date, they all connect to an NTP server to update their time, much like cell phones use the cell network to determine the correct time. This is why I’m surprised at the response of the rest of the house clocks when the power goes out.
Sure, there are a few clocks that just lose the time. That’s to be expected. But then there is the bedroom alarm clock. The bedroom alarm clock, like most of the other clocks in the house, goes dark when the power goes out. But when the power comes back on, it hasn’t lost any time. On the other hand, it hasn’t gained any time, either. This is a dangerous business, since it looks close enough to correct - not flashing annoyingly - to convince you not to mess with it, but it’s off significantly enough to get you into work late.