The short answer: federal law won’t allow it. Under the Uniform Time Act of 1966, states can opt out of daylight saving time by switching to permanent standard time, but they cannot adopt permanent daylight saving time. Since most people (and most state legislatures) want to keep the longer summer evenings rather than give them up, they’re stuck waiting for Congress to change the rules. And Congress, despite broad public support, keeps stalling.
The Federal Law Blocking Change
The Uniform Time Act, enforced by the Department of Transportation, created a simple but rigid framework. States get two choices: follow the national daylight saving schedule or exempt themselves entirely and stay on standard time year-round. Hawaii and most of Arizona have taken this route. But permanent daylight saving time, the option most Americans say they prefer, requires an act of Congress.
The Sunshine Protection Act, which would make daylight saving time permanent nationwide, passed the U.S. Senate unanimously in 2022. Then it died in the House without a vote. The bill has been reintroduced multiple times since, most recently in 2025, but has not advanced. The pattern repeats: broad enthusiasm in principle, zero urgency in practice. Clock changes affect everyone twice a year, but they don’t rise to the level of crisis that forces legislative action. They compete for floor time with issues lawmakers consider more pressing.
19 States Are Ready, but Waiting
Frustration with the twice-yearly clock change has pushed state legislatures to act on their own, at least as far as they legally can. In the last seven years, 19 states have passed laws or resolutions to adopt permanent daylight saving time, contingent on Congress granting permission. Florida was first in 2018. Texas joined the list in 2025. The full roster includes states across every region: Alabama, Colorado, Delaware, Georgia, Idaho (Pacific zone only), Louisiana, Maine, Minnesota, Mississippi, Montana, Oklahoma, Oregon (Pacific zone only), South Carolina, Tennessee, Utah, Washington, and Wyoming.
These are essentially trigger laws. They sit on the books doing nothing until federal legislation passes. Some include an additional condition: they only take effect if neighboring states do the same, to avoid a patchwork of time zones within a single region. That coordination problem is real. If Oregon goes permanent DST but California doesn’t, cross-border commuters and businesses face daily confusion.
Powerful Industries Want DST to Stay
One reason daylight saving time has been so durable is that certain industries benefit enormously from the extra hour of evening light and spend real money defending it. The golf industry is the most visible example. Lobbying by golf interests is largely credited with convincing Congress to extend daylight saving time by a month in the mid-1980s, and those same groups continue pushing for permanent DST today.
The numbers illustrate why. One golf course general manager in Nebraska estimated that switching to permanent standard time would cost his course $500,000 a year and eliminate 100 tee times per day. Late-afternoon golf leagues account for up to 40% of annual revenue at some courses, and nearly half of all golf lessons happen after 4 p.m. Retail, outdoor recreation, and restaurant industries similarly benefit from customers who are more willing to shop and spend money when it’s still light outside after work. These interests don’t necessarily oppose ending the clock change. They oppose ending it in the wrong direction, toward standard time, which would mean darker winter evenings.
This creates a political tug-of-war. The industries want permanent DST. Sleep scientists want permanent standard time. Congress, caught between the two, does the easiest thing: nothing.
The Energy Argument Collapsed
Daylight saving time was originally sold as an energy conservation measure, first during World War I and again during the energy crises of the 1970s. Politicians argued that each additional day of DST would save the equivalent of 100,000 barrels of oil per day. A 2008 Department of Energy study estimated electricity savings of 0.5% for each day of extended DST, which sounds modest but was still used to justify the policy.
More rigorous research tells a different story. A Yale and NBER study using a natural experiment in Indiana, where counties switched to DST at different times, found that daylight saving time actually increased residential electricity demand by about 1%. The reason is straightforward: while lighting costs dropped slightly in the evening, air conditioning use in the longer, hotter afternoons more than offset the savings. In a modern economy with climate control in nearly every building, the original energy rationale no longer holds up. Yet the policy persists because the law was never designed to sunset when its justification did.
Sleep Scientists and Health Groups Disagree With the Public
Here’s the complication that stalls Congress more than anything else: the public and the medical community want opposite things. Polls consistently show Americans prefer permanent daylight saving time. The American Academy of Sleep Medicine, along with most major medical organizations, says permanent standard time is the only healthy option.
Their reasoning centers on circadian biology. Your internal clock is set primarily by light and darkness. Standard time aligns the social clock (when you wake up, go to work, go to school) with the solar clock (when the sun actually rises and sets). Under daylight saving time, mornings are darker and evenings are lighter, which pushes your body’s preferred sleep time later while your alarm stays the same. The AASM’s position statement notes that evidence indicates the body clock does not fully adjust to DST even after several months, creating a persistent state researchers call “social jet lag,” a chronic mismatch between when your body wants to sleep and when your obligations force you awake.
The acute effects of the spring transition are well documented. Researchers have found that the overall rate of ischemic stroke is 8% higher in the first two days after the spring clock change, with people over 65 facing a 20% higher risk. Studies have also linked the transition to increased heart attacks, car accidents, and workplace injuries. These spikes are short-lived, but they illustrate how even a one-hour shift disrupts the body. Permanent DST would, in the AASM’s view, lock in a milder version of that disruption year-round rather than eliminating it.
Farmers Never Wanted It in the First Place
A persistent myth holds that daylight saving time exists to help farmers. The opposite is true. When DST was first adopted during World War I as a wartime energy measure, the agricultural industry actively opposed it. Farmers argued the time shift cost them an hour of productive morning light and disrupted their ability to get crops harvested and to market on schedule. They successfully lobbied Congress to repeal it in 1919 after the war ended. The practice returned during World War II and was eventually standardized in 1966, but farming interests were on the other side of the debate from the start.
Europe Is Stuck Too
The United States isn’t alone in this gridlock. In 2019, the European Parliament voted to end seasonal clock changes across the EU. Six years later, nothing has happened. As of March 2025, the European Commission confirmed the plan remains “under review,” with member states still submitting feedback. The core problem mirrors America’s: member states can’t agree on whether to lock in summer time or winter time, and nobody wants to create mismatched time zones with their neighbors. The current system of changing clocks on the last Sunday in March and October remains in place indefinitely.
The pattern is the same on both sides of the Atlantic. Almost everyone agrees the clock changes are annoying and potentially harmful. Almost no one can agree on what to replace them with. Industries want permanent DST for the economic boost. Doctors want permanent standard time for public health. Neighboring jurisdictions need to coordinate. And legislators, facing no real deadline and a genuinely complicated tradeoff, keep putting the decision off for another session.