The US observance of DST was done for energy consumption, largely coming out of our 2 world wars when energy was a key issue. That said, in watching a state that relatively recently adopted DST, it actually increased energy consumption[1].

Meanwhile, research has shown that the impact of losing an hour due to DST observation has an impact on the heart[2][3][4].

So this policy appears to be one that literally saves lives while at the same time having the additional benefit of potentially reducing energy consumption at a time when we're dealing with an energy crisis.

[1] https://www.nber.org/system/files/working_papers/w14429/w144... [2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4189320/ [3] https://openheart.bmj.com/content/openhrt/1/1/e000019.full.p... [4] https://www.sciencedirect.com/science/article/abs/pii/S00029...