Daylight Savings a really stupid idea that never really did what it claimed it would. But it claimed that it was going to reduce electricity use. Globally, it may have a reduction of ~0.3%.

But we did it because of the "you have to do something" mindset. Then, once we did the stupid thing for the sake of doing a thing, we kept it because "no no no, it's doing a thing".

At this point, undoing it means either someone in power sticking their neck out and saying "we're doing this", or getting a lot of people on board. And people are inherently resistant to change, especially when it's a thing they've always done.