I'm mildly surprised this discussion hasn't brought up the artificiality
of daylight savings time, summer time, and whatever other names it might
be called by around the world. Certainly the concept is prevalent
enough.
Leaving aside the arguments about saving energy (I am not knowledgeable
enough to speak to that in any event), daylight savings time seems to be
an enormous confusion factor, especially since (as one example) Europe
and North America have different start and end dates.
On one level it seems that DST is a way of patching a system that is
fundamentally flawed, hence some of the very interesting suggestions in
these discussions about alternative methods of timekeeping. But changing
such an entrenched and widespread standard might be next to impossible.