Thanks for your note.
A couple of years ago I counted the number of
devices I had to change (yes, including my
car's clock). I forget the exact number, but
recall it being about 1.5 dozen. It's nonsense!
I agree with you it's better to stick with a single
time, although I'd prefer standard time (high
noon is noon) rather than daylight time (high
noon is 1:00).