It also mandated the screwed up, gerrymandered daylight savings time regimen we are on, where we switch to “Summer” time while the calendar still reads “Winter.” It is very distressing.
I was one of the few that hated that. Certain devices like VCRs had the time switch hard coded programmed to the specific two days and the automatic switch had to be disabled and time change done manually twice per year.
The claim was that extending DLST into early and late winter would save energy, but that is crap. To REALLY save energy by playing with the clocks you could force people to go to work in the evenings in the peak summer when the sun is down, so the peak heat would be off most work hours. But that would be very unpopular.