On July 15, 2026, the U.S. House of Representatives voted 308–117 to pass the Sunshine Protection Act, which would eliminate the twice-yearly clock change and lock the country into daylight saving time year-round. The bill now sits with the Senate, where its outcome is uncertain. What's gotten far less attention than the vote itself is this: the sleep science community has spent years lobbying for exactly the opposite policy.
What the Bill Would Actually Do
The Sunshine Protection Act would end the practice of "falling back" every November, keeping clocks permanently on daylight saving time instead of returning to standard time each winter. Supporters argue it would mean more usable daylight in the evenings year-round and eliminate the disruption of the biannual switch. Opponents, including Rep. Mary Gay Scanlon, have pointed out that the U.S. already tried permanent daylight saving time once, briefly, in 1974 — and public backlash over pitch-dark winter mornings helped kill it within a year. Senate Democrat Patty Murray has since called on Majority Leader John Thune to bring the bill to a vote, but a number of senators on both sides of the aisle have signaled resistance, and its path forward remains genuinely unclear.
Why Sleep Scientists Have a Problem With This
Here's the part that rarely makes it into the political coverage: the American Academy of Sleep Medicine (AASM) has an official position statement on this exact question, and it doesn't support what Congress just voted for. In a statement endorsed by 20 medical, scientific, and civic organizations, the AASM concluded that permanent standard time — not permanent daylight saving time — is the option best aligned with human circadian biology.
The reasoning comes down to how your internal clock actually gets set. Your circadian rhythm is synchronized primarily by exposure to morning light hitting your eyes shortly after you wake. Standard time keeps sunrise closer to your natural wake time year-round. Permanent daylight saving time does the opposite — it artificially delays sunrise by an hour, every single day, all winter long. In much of the northern half of the country, that would push sunrise past 8:30 or even 8:45am for weeks at a stretch, meaning millions of people would be commuting to work and sending kids to school in the dark, waking up before their bodies receive the light signal that's supposed to shut off melatonin production.
The AASM's statement points to several downstream risks tied to that circadian misalignment: more difficulty falling asleep, chronic sleep debt, and mood disturbances. The evidence on cardiovascular risk specifically is more mixed than headlines often suggest — some smaller studies found a short-term uptick in heart attacks after the spring clock change, but a 2025 systematic review and meta-analysis of over 168,000 patients found the overall evidence inconsistent, with no significant increase in several of the largest datasets. What's better established is the effect on alertness and safety: traffic accidents reliably tick up in the days immediately following the spring transition, most likely due to the abrupt loss of an hour of sleep. Permanent daylight saving time wouldn't eliminate the underlying circadian misalignment — it would just make the darker-morning version of it permanent instead of temporary.
What This Would Mean for Your Sleep, Practically
If the bill becomes law, the clearest effect for most people won't be a dramatic one – it'll be a chronic, low-grade one. Waking up before your body's natural light cue, day after day through the winter months, tends to show up as harder mornings, a nagging sense of being perpetually a little "behind," and a wake time that never quite feels aligned with how alert you are. It's the kind of misalignment that's easy to write off as just not being a morning person, when the actual cause is external light exposure timing that's now working against your biology instead of with it.
None of this means you're powerless while Congress sorts itself out. The two levers that matter most — getting bright light exposure soon after waking and keeping a consistent sleep-wake schedule — work regardless of what the clock says. If mornings are dim where you live, a 10–15 minute walk outside shortly after waking, or sitting near a bright window while you get ready, gives your circadian system the signal it needs even when the sun is cooperating less. We cover the mechanics of how light exposure shifts your internal clock in more detail in our guide to how light affects your sleep.
If you're not sure whether your current wake time is actually working with or against your body's rhythm, our free Sleep Schedule Builder can help you map out a wake and bedtime window based on your own patterns, rather than guessing — useful right now, and something you'd want to revisit again if the clocks do end up changing for good.
- The House passed the Sunshine Protection Act 308–117 on July 15, 2026, which would make daylight saving time permanent; it now awaits an uncertain Senate vote.
- The American Academy of Sleep Medicine and 20 endorsing organizations have taken the opposite position: permanent standard time, not daylight saving time, is what actually aligns with human circadian biology.
- Permanent daylight saving time would push sunrise later everywhere, meaning darker winter mornings and a wake time consistently ahead of your body's natural light cue.
- Regardless of the bill's outcome, morning light exposure and a consistent wake time are the two most effective tools you have to keep your own circadian rhythm on track.
Whichever way the Senate ultimately goes, the underlying sleep science doesn't change. Understanding how your circadian rhythm actually responds to light is far more useful, long term, than which way the clock gets set.
Source: CBS News — "House passes bill to make daylight saving time permanent," July 15, 2026, https://www.cbsnews.com/news/daylight-saving-time-permanent-house-vote/
Medical disclaimer: This article is for informational purposes only and does not constitute medical advice. If sleep or circadian rhythm problems are significantly impairing your functioning, please consult a qualified healthcare provider or sleep specialist.
About the author: Morgan Wells is a certified sleep analyst and wellness writer with over a decade of experience in behavioral sleep health. Learn more about Morgan.