With this morning's semi-annual changing of the clock for Daylight Savings Time (DST), I'm once again left to ponder...why, in this era of GPS-equipped automobiles, do I have to manually set the clock in my car? We had, until very recently (we sold one), three cars with factory GPS units. Of those three, only one uses the GPS signal to set the car's clock. In the other two vehicles, we have to manually adjust the clock, even though an extremely accurate time and date signal is one of the features of the GPS satellites.
So my car knows the date, and it knows the correct time...so why can't it figure out that DST has started or ended?
Things have definitely improved over the last 30 years, though--today, we had only a handful of clocks to change. In addition to one of the cars, there were a couple of televisions (another device that seems to me should be capable of changing its own clock), our microwave, and a few assorted clock radios and wall clocks. But most of the clocks we own synchronize automatically with a time signal, so they were correct when I woke up this morning. The computers, of course, handle the change seamlessly. (The fact that I stopped wearing a wrist watch a few years ago also helps; I have ten or so sitting in a drawer somewhere, but I no longer bother to set them.)
I'm not sure I'll live long enough to see a DST start/stop day where I don't need to manually set a clock...but I'm hoping I do!