1. United States
2. Ohio
3. Letter

End the biannual clock switch and pass permanent standard time. A Stanford Medicine study published September 15 in the Proceedings of the National Academy of Sciences compared all three policy options and found that permanent standard time is the clear winner for public health — projecting 300,000 fewer stroke cases and 2.6 million fewer obesity cases nationwide compared to what we have now. The science is straightforward: morning light keeps the human circadian clock synchronized to a 24-hour day, and permanent standard time maximizes that exposure. An out-of-sync circadian clock weakens immune function and energy regulation. The American Academy of Sleep Medicine, the National Sleep Foundation, and the American Medical Association all back permanent standard time. Congress has had chances to act on this for years. It's time to stop stalling and get it done.