It used to be that people would have to change every clock manually, when daylight savings time started or ended. But as computers and devices got smarter, they could be pre-programmed to change the time automatically.
My parents’ first PC originally didn’t change the time by itself, as it wasn’t supported in Windows 3.11. But we later upgraded to Windows 95, and I was pleasantly surprised to see a message one morning on the screen, telling me that Windows had automagically changed the clock for us. Later versions of Windows just did the time change on the quiet, and most other operating systems do the same nowadays.
We’re now in that stage of technological innovation where some of our devices can change the time automatically, but not all. Our phones, computers and tablets are all capable of it. Our Freesat satellite TV set-top box just needed turning off and on again to update the time. Even my Fitbit Charge changed automatically too, which was nice.
I still had to manually change the central heating controls, though. We’re planning to get a new central heating system sometime in the next couple of years and I expect we’ll get a smart thermostat which will have daylight savings capability, so changing the time for heating won’t be an issue in future.
The only other device that I had to change was our basic analogue clock in the kitchen. Short of wiring up some kind of Arduino device to it, I doubt I’d ever be able to make it change automatically.
Still, it’s nice not having to spend all morning re-programming things like we did in the past.