🔬 Science and technology · Beginner · Policy resolution

Resolved: The United States should adopt permanent daylight saving time.

Many Americans want to stop changing the clocks twice a year. If we pick one time all year, should it be daylight saving time or standard time?

Background

Most of the United States moves clocks forward an hour in spring (daylight saving time) and back in fall (standard time). In March 2022 the U.S. Senate passed the Sunshine Protection Act by unanimous consent, which would have made daylight saving time permanent, but the House did not pass it; the bill has been reintroduced since. Federal law currently lets states choose permanent standard time (as Hawaii and most of Arizona do) but not permanent daylight saving time. [1][2]

The country tried year-round daylight saving time once before, starting in January 1974 during an energy crisis. Public support fell sharply during that dark winter, and Congress restored standard time for the winter months later that year. Today, sleep scientists, including the American Academy of Sleep Medicine, support ending clock changes but favor permanent standard time, saying it better matches the body’s clock; supporters of permanent daylight saving time point to more evening daylight. [2][1]

Where the facts themselves are disputed

Which permanent time is better for health and safety?

  • Sleep-medicine groups say standard time fits the body’s clock better and avoids very dark winter mornings.
  • Supporters of daylight saving time cite studies linking evening light to fewer evening crashes and crimes and more outdoor activity.

Key terms

Standard time
Clock time set by the time zone, used in winter; noon is close to when the sun is highest.
Daylight saving time (DST)
Clocks set one hour ahead of standard time, moving daylight from morning to evening.
Circadian rhythm
The body’s roughly 24-hour internal clock, set mainly by light.
Social jet lag
The mismatch between the body’s clock and the clock on the wall.

Both sides at their strongest

Each argument is written the way its best advocates would make it, followed by the strongest answer from the other side. Use them to build your case and to prepare for the other one.

Affirmative

End the clock switching and keep the extra hour of evening light all year.

  1. A1 Ending the twice-yearly switch prevents its harms.

    Why The spring change cuts an hour of sleep, and studies link the weeks after clock changes to more heart attacks and crashes. One permanent time ends that.

    Evidence Research cited by Sen. Rubio on heart attacks and accidents after clock changes; studies of the spring transition.

    Best answer The negative answers that permanent standard time also ends the switch, so this argument doesn’t favor daylight saving time.

  2. A2 Evening light helps people be active and safe.

    Why More daylight after school and work means more time outdoors, and darkness during the evening commute is linked to more pedestrian crashes and some crimes.

    Evidence Studies of evening light and crime and traffic safety; research on physical activity and daylight.

    Best answer The negative replies that the same hour is taken from the morning, putting children at bus stops in the dark.

  3. A3 People like long summer evenings.

    Why Polls show many Americans prefer daylight saving time’s later sunsets, and the Senate passed the bill unanimously, reflecting broad support.

    Evidence Senate passage of the Sunshine Protection Act (March 2022); public opinion polls on time preferences.

    Best answer The negative points out that in 1974 public support collapsed once people lived through dark winter mornings.

  4. A4 Businesses and recreation benefit from later light.

    Why Shops, parks, sports leagues and outdoor businesses do better when daylight lasts into the evening.

    Evidence Industry studies of retail and recreation during daylight saving time; testimony from business groups.

    Best answer The negative replies that economic gains are uncertain and don’t outweigh health concerns.

Negative

Ending clock changes is good, but standard time, not daylight saving time, should be permanent.

  1. N1 Standard time better matches the body’s clock.

    Why Morning light sets the body’s internal clock. Permanent daylight saving time would leave many people waking and starting work or school in the dark for months, causing chronic “social jet lag.”

    Evidence American Academy of Sleep Medicine position statements; circadian research.

    Best answer The affirmative answers that people adapt, and evening light offers its own health benefits through activity.

  2. N2 Winter mornings would be very dark.

    Why Under permanent daylight saving time, winter sunrise would come after 8 a.m. in much of the country and after 9 a.m. in some northern places, so children would wait for buses and walk to school in the dark.

    Evidence AASM analysis of winter sunrise times; sunrise tables for northern cities.

    Best answer The affirmative replies that schools can adjust start times, and evening darkness is also dangerous.

  3. N3 The country tried it and reversed course.

    Why In 1974, year-round daylight saving time was popular until people lived through a dark winter; support fell and Congress changed the law within the year.

    Evidence History of the Emergency Daylight Saving Time Energy Conservation Act of 1973 and its repeal.

    Best answer The affirmative argues that was a sudden emergency change, and today’s debate is more informed.

  4. N4 Health and safety groups favor standard time.

    Why When sleep doctors, the National Safety Council and the National PTA agree, their combined expertise on health and children’s safety deserves weight.

    Evidence AASM statement supported by more than a dozen organizations, as reported in 2022.

    Best answer The affirmative replies that expert groups disagree on how to weigh evening safety and activity, and voters also deserve a say.

Strawman or steelman?

A strawman is a weak copy of the other side’s view, easy to knock down and unfair to the people who hold it. A steelman is that view at its strongest. Answer the steelman, and you’ve answered the real argument. (More on steelmanning.)

Affirmative

Strawman “They just want more time to play outside in summer.”

Why it’s unfair Supporters also cite the harms of clock changes and evening safety.

Steelman Ending the switch prevents its harms, and keeping evening light all year supports activity, safety and the economy, which is why the Senate passed it unanimously.

Negative

Strawman “They want to keep changing the clocks forever.”

Why it’s unfair Most opponents of permanent DST want to end the switch too, but on standard time.

Steelman End the switch, but on standard time, which matches the body’s clock and avoids dark winter mornings, as sleep experts recommend and as 1974 showed.

Weak arguments to avoid

Affirmative

  • “Daylight saving time gives us more daylight.” It moves daylight from morning to evening; the total is the same.

Negative

  • “Farmers need daylight saving time.” A common myth; farmers generally opposed it. It also argues against your own side.

Questions for cross-examination

Ask the Affirmative

  1. When would the sun rise in December in your city under your plan?
  2. What happened in 1974?
  3. Does permanent standard time also end the switch?

Ask the Negative

  1. Do most Americans prefer later sunsets?
  2. Are evening commutes in the dark dangerous too?
  3. Why did the Senate pass the bill unanimously?

Reading on both sides

Read at least one source from each side before you debate. Look up each source’s author and publisher too: who wrote it is part of the evidence.

Background and overviews

Both sides in one place

Mostly Negative

Practice this topic

Sources for the background

  1. Senate votes to make daylight saving time permanent; some push back on idea, WHIO (2022-03-17). Accessed 2026-10-25.
  2. AASM opposes permanent daylight saving time, American Academy of Sleep Medicine (2023-03-02). Accessed 2026-10-25.

Teddy Rook Book doesn’t take a side on this resolution. Updated 2026-10-25.

@teddyrookbook GitHub