Daylight Saving Time: The Great Debate

Atmosphere with Emily Gracey · Oct 27, 2026 · 34m · transcript

Twice a year, Americans change their clocks. Twice a year, we argue about whether we should stop. But what does the science actually say?

Stanford sleep researcher Dr. Jamie Zeitzer joins Atmosphere to unpack the surprisingly complicated science behind daylight saving time. Is permanent standard time really healthier? And are we overlooking a much bigger problem while arguing about the clocks?

From the Sunshine Protection Act to our alarming lack of natural daylight, Jamie explores how sunlight affects our circadian rhythms, sleep, and overall health. He also shares surprisingly simple ways…