In mid-July 2026, the U.S. House of Representatives passed the Sunshine Protection Act by a bipartisan vote of 308–117, reviving a yearslong push to end the twice-a-year ritual of changing clocks. The bill, championed by Florida Congressman Vern Buchanan and backed by President Trump, would make daylight saving time (DST) the permanent, year-round standard across most of the country.
States that currently opt out of DST — Hawaii and most of Arizona — could remain on standard time, and other states would have the ability to exempt themselves before the law takes effect. The measure now heads to the Senate. A similar bill passed that chamber unanimously in 2022 but never got a House vote, and a 2025 attempt to fast-track passage stalled after Arkansas Senator Tom Cotton raised concerns about dark winter mornings.
If the Senate follows suit and the bill is signed into law, it would end the biannual "spring forward, fall back" cycle for good. However, the effects of that change would land very differently depending on where in the country you live. What would permanent DST mean regionally? What is the scientific evidence for and against the change? And what happened when we did this before? Because, as a reminder, this isn't the first time America has tried this permanent DST experiment.
How It Would Play Out Region by Region?
The core effect of permanent DST is simple: clocks would stay "sprung forward" all year, meaning more daylight in the evening and, correspondingly, later sunrises in the winter. But how noticeable that trade-off is depends heavily on two things — how far north or south a location sits, and where it falls within its time zone.
The Upper Midwest and Northern states (Michigan, Minnesota, Wisconsin, Maine, Vermont, North Dakota): These states would feel the change most acutely in winter. Because northern latitudes already have shorter winter days, permanent DST would push sunrise past 8:30 a.m. in much of this region. In the northwesternmost parts of time zones — like far northern Michigan or northern Maine — sunrise could creep toward 9 a.m. or later around the winter solstice. School bus stops and morning commutes would happen in the dark for a larger chunk of the year.
The Western edge of time zones (western Michigan, western Indiana, the Florida Panhandle, parts of Texas near the Central/Mountain line, and eastern Oregon or Washington within the Pacific zone): Communities near the western boundary of a time zone are already the "losers" of standard time-zone geography — they get darker mornings and lighter evenings relative to places at the eastern edge of the same zone. Permanent DST would compound this. Places like Fort Wayne, Indiana, or parts of the Panhandle could see winter sunrises after 8:15–8:30 a.m.
The South and Sun Belt (Florida, Georgia, the Carolinas, Texas, Arizona, Southern California): Because these states are closer to the equator, their day-length swings are less extreme, so permanent DST is generally an easier sell. Florida lawmakers have been among the loudest proponents — the bill's lead sponsor is a Florida representative — since the state's tourism- and outdoor-recreation-driven economy benefits from extra evening daylight without the harsh winter mornings northern states would face.
Arizona and Hawaii: These are the wild cards. Both currently sit on permanent standard time and opt out of DST entirely — largely because Arizona's desert heat makes extra evening sunlight in summer unwelcome, and Hawaii's tropical latitude makes DST largely irrelevant.
Take Arizona specifically: it runs on Mountain Standard Time (UTC-7) every day of the year and never shifts. Nearby Mountain zone states like Colorado, Utah, and New Mexico currently match Arizona's clocks for about four months of the year (when everyone is on standard time) and run an hour ahead the rest of the year (when those states spring forward and Arizona doesn't). Under permanent DST, those neighboring states would be locked into Mountain Daylight Time (UTC-6) for good — so Arizona would be permanently one hour behind them, with no more months of alignment. Meanwhile, California, Oregon, and Washington would be locked into Pacific Daylight Time (UTC-7) — the exact same UTC offset Arizona already sits at year-round. So without changing a single law of its own, Arizona's clocks would end up permanently matching Pacific time, even though Arizona would still legally be on "Mountain Standard Time" — it just happens to share the same offset PDT already uses. It's not officially becoming Pacific time; it would just always read the same as one.
Northeastern cities (Boston, New York, Philadelphia): These areas would see relatively modest disruption, since they sit closer to the middle-to-eastern portion of the Eastern time zone. Winter sunrises would shift from around 7:15 a.m. to closer to 8:15 a.m., a noticeable but not extreme change, while evening daylight would extend an hour longer.
States that already have "permanent DST" laws on the books: Nearly 20 states — including Florida, Tennessee, and others — have already passed legislation to adopt permanent DST contingent on federal authorization, since current federal law bars states from unilaterally doing so (they may only opt for permanent standard time, as Arizona and Hawaii have). If the Sunshine Protection Act becomes law, these states would be positioned to implement the change immediately.
The Science: Weighing the Pros and Cons
The debate over permanent DST isn't just political. It's grounded in a real, if contested, body of research spanning sleep medicine, public health, and economics.
Arguments in favor:
- Reduced spring transition risk. Multiple epidemiological studies have linked the March "spring forward" shift to a short-term uptick in heart attacks, strokes, and workplace accidents in the days immediately following the time change, attributed to abrupt sleep disruption. Eliminating the biannual switch would remove this recurring risk entirely, regardless of which permanent time were chosen.
- More evening daylight for activity. Proponents argue that extra evening light encourages outdoor exercise, reduces after-school and after-work darkness, and may modestly reduce evening crime rates, since more visibility during high-activity hours has been associated with fewer opportunistic crimes in some studies.
- Potential traffic safety benefits. Some research has found that fewer pedestrian fatalities occur during well-lit evening rush hours than during darker ones, since evening commute traffic volume tends to be higher than early-morning volume.
- Economic and energy arguments. Retail, golf, and outdoor recreation industries have historically lobbied for more evening light, arguing it boosts consumer spending after the workday ends. Energy savings claims are more contested (more on that below).
Arguments against, and the sleep science pushback:
- Circadian rhythm mismatch. This is the crux of the scientific objection, and it's the reason organizations like the American Academy of Sleep Medicine (AASM) have formally opposed permanent DST in favor of permanent standard time instead. Human circadian rhythms are synchronized primarily by morning light exposure. Permanent DST would delay that morning light — especially in winter — which sleep researchers argue leads to chronic circadian misalignment: harder time waking up, delayed melatonin suppression, and knock-on effects on mood, metabolism, and alertness that could persist for months at a time rather than resolving after a few days, as the biannual switch does.
- Darker mornings, real safety costs. Critics, including several members of Congress during floor debate, pointed to the 1970s experiment (below) as evidence that dark winter mornings create tangible risks for commuters and schoolchildren waiting at bus stops, particularly in northern latitudes.
- Energy savings are unproven. The original rationale for DST — energy conservation — has weak empirical support. A frequently cited 2008 U.S. Department of Energy study found only marginal electricity savings from DST extension, and some regional studies (notably one from Indiana after it adopted DST statewide) found increased overall energy use, as reduced evening lighting demand was offset by increased air conditioning and heating use tied to shifted activity patterns.
- Seasonal affective effects. Some researchers have raised concerns that darker mornings could worsen symptoms of seasonal affective disorder (SAD) for people already sensitive to reduced morning light exposure in winter, since morning light is thought to play an outsized role in regulating mood-related circadian signaling.
Notably, most sleep and circadian scientists who study this issue do not oppose ending the flipping back and forth of clocks — they oppose landing on DST specifically. Their preferred outcome is the opposite of what the Sunshine Protection Act proposes: permanent standard time, which keeps clocks better aligned with natural light patterns year-round. And no more "springing forward" or "falling back."
Déjà Vu: The 1970s Experiment America Already Tried
This isn't uncharted territory. In January 1974, in the middle of the OPEC oil embargo and a national energy crisis, Congress passed the Emergency Daylight Saving Time Energy Conservation Act, signed by President Richard Nixon, putting the entire country on permanent daylight saving time as a two-year trial intended to cut energy consumption.
Initially, the idea was broadly popular — a Gallup poll taken before implementation showed strong majority support, driven by enthusiasm for saving energy amid gas lines and fuel shortages. But public opinion soured fast once the reality of dark winter mornings set in.
The turning point came in the following weeks, when reports emerged of children walking to school or waiting at bus stops in pitch darkness during the winter months, since sunrise in many parts of the country didn't occur until well after 8 a.m. — later than 9 a.m. in some northern and western locations within their time zones. Several child pedestrian deaths in the early morning hours were publicly linked to the reduced visibility, and the stories generated significant national media attention and public alarm, regardless of the precise causal role time changes played in any individual case. Parent groups and school officials in numerous states lobbied for a reversal.
Support collapsed. By October 1974 — less than a year into what was meant to be a two-year trial — Congress voted to repeal the law and reinstate the standard seasonal clock-change system, and the country reverted to standard time for the winter months starting that fall.
The episode has become the central historical reference point in every subsequent debate over permanent DST, and it's exactly what critics like Senator Cotton and Representative Scanlon invoked in 2026 when raising concerns about the current bill: the worry that a policy popular in the abstract, and popular in summer, could prove far less popular once Americans actually experience a full winter of dark mornings.
What Happens Next
The bill's fate now rests with the Senate, where previous versions have struggled to gain traction despite broad public support for ending the clock-switching ritual itself. The central tension that sank momentum in 2025, and that shaped the House debate in July 2026, remains unresolved: most Americans agree the twice-yearly time change should end. But there is no consensus on which permanent time — daylight or standard — should replace it. Sleep scientists favor standard time; retail, recreation, and much of the public favor the extra evening daylight of DST. Until the Senate acts, and until that underlying disagreement is settled, Americans will keep changing their clocks twice a year, just as they have for most of the past five decades.
