Key Takeaways
Clock changes do more than shift daylight. They change how your body keeps time.
- Daylight saving time moves clocks 1 hour ahead from March to November. Standard time covers the rest of the year and follows the sun more closely.
- Switching between Daylight Saving Time and Standard Time can disrupt sleep schedules, leading to short term fatigue and reduced well being.
- The biannual time change has sparked ongoing debate, with many experts questioning whether year-round Standard Time would better support sleep and health.
- Daylight Saving Time pushes winter sunrises later, with some regions seeing daylight after 8:30 a.m., which can make mornings feel harder.
- Standard Time creates earlier summer sunrises, sometimes before 4:30 a.m., which can impact early-morning light exposure.
- Consistent light timing matters. Stable schedules and morning light exposure help reduce the sleep disruption caused by clock changes.
Congress is still debating whether to lock the clock for good. You can follow where the permanent daylight saving time bill stands, along with the bedtime plan for either outcome.
Every year, the "fall back" and "spring forward" of the clocks flip the Daylight Saving Time (DST) switch on and off. The result is groggy mornings, irritable days, and sleep that feels off, sometimes for weeks.
These time changes disrupt your internal clock, which can affect your health and overall well-being. A bed cooling system can help keep your sleep environment steady while your body adjusts to the new time change.
Here is how the two compare if either one became permanent, and what each could mean for your sleep.
What Is the Difference Between Daylight Saving Time and Standard Time?
Standard time follows the sun most closely, and daylight saving time moves the clock 1 hour ahead to push more daylight into the evening.
In most of the U.S., daylight saving time runs from the second Sunday in March to the first Sunday in November.
Standard time covers the rest of the year. Hawaii and most of Arizona stay on standard time all year.
The Clock Changes. Your Bed Temperature Doesn't Have To.
Twice a year, the clock shifts and your body has to catch up. A cooler bed may help you fall asleep faster. The Chilipad 2.0 uses water to keep your bed at your ideal temperature, from 55 to 115ºF, so your sleep stays steady no matter what the calendar says. No subscription, just better nights.
Where Did Daylight Saving Time Come From?
The United States first used Daylight Saving Time (DST) during World War I to help the war effort and save energy. In theory, DST shifted more daylight into evening hours, reducing the need for electricity.
Since electricity was often generated by burning fuel, DST meant people would use less electricity and, therefore, less fuel.
In 1918, Congress passed the Standard Time Act, which included the implementation of DST. After the war, few people liked the DST law. So, in 1919, much to President Wilson’s chagrin, Congress repealed the act.
Wilson favored DST because he believed it provided people with more leisure time in the evenings and conserved energy due to the extended natural light.
During World War II, President Roosevelt reinstated Daylight Saving Time, which he called ‘War Time’ and made it year round. This started in 1942 and continued until the war ended in 1945.
After the war, different parts of the country were allowed to choose whether or not to use Daylight Saving Time. Finally, in 1966, President Johnson passed a law that made it the same nationwide.
In 2022, the U.S. Senate passed a bill called the Sunshine Protection Act that would make daylight saving time permanent.
It stalled in the House of Representatives because lawmakers could not agree on whether to keep standard time or permanent daylight saving time.
In July 2026, the House passed a new version of the bill. The Senate has not voted, so clocks still change twice a year. Get the latest on the permanent daylight saving time.
Benefits of Standard Time Year Round
Maintaining Standard Time year round offers several benefits for health, safety, and overall well being:
Supports Natural Sleep Cycles
Standard time aligns with the natural cycle of light and dark, helping regulate the body’s internal clock (called the circadian rhythm) and promoting better sleep quality and consistency.
Improves Physical Health
A stable sleep schedule and exposure to morning sunlight can reduce the risk of cardiovascular issues, strengthen the immune system, and support overall physical health.
Supports Mental Health
Morning light exposure increases serotonin production, which helps improve mood, reduce stress, and support mental clarity throughout the day.
Promotes Safety
Consistent sleep patterns and natural morning light reduce fatigue, improving safety on roads, at work, and in other activities that require focus and awareness.
Aligns with Human Biology
Standard time mirrors the sun’s natural rise and fall, helping to balance hormones like melatonin and cortisol, which play a central role in sleep, energy, and overall health.
Benefits of Daylight Saving Time Year-Round
Keeping Daylight Saving Time year-round also offers several benefits that can positively impact health, productivity, and daily life:
More Evening Daylight
Extended daylight in the evening allows for more time to enjoy outdoor activities, exercise, or spend quality time with family and friends after work or school.
Furthermore, people who identify as “night owls” find themselves enjoying more productivity with longer days as well.
Encourages Physical Activity
With more daylight in the evening, people are more likely to engage in outdoor activities such as walking, running, or playing sports, supporting physical health and fitness.
Improves Mental Health
Extra evening sunlight can help boost mood and reduce symptoms of seasonal depression by increasing exposure to natural light later in the day.
Increases Productivity
Longer daylight in the evening provides more opportunities to accomplish tasks, run errands, or participate in hobbies, leading to a more productive and fulfilling day.
Reduces Energy Use
With more daylight in the evening, there’s less need for artificial lighting, which may help lower energy consumption and reduce electricity costs.
Promotes Safety in the Evening
More daylight during evening commutes or activities can help reduce accidents and improve safety, as visibility is greater in natural light.
Compare Year-Round Daylight Savings Time vs Standard Time
The chart below compares DST and Standard Time across a few major metropolitan US cities; New York, Los Angeles, & Atlanta.
Circled are key times to consider how they may impact your daily life, not just your sleep schedule.
As an example, New Yorkers may not want the Sunrise to be at 4:25 am in the Summer on Standard Time. Similarly, they may not want Sunrise to be at 8:16 am in the Winter on DST.
The Bottom Line
There's no perfect answer in the daylight saving time vs. standard time debate. Standard time follows the sun more closely, which is why sleep experts tend to favor it. Daylight saving time gives you brighter evenings, and plenty of people love that.
For sleep, consistency matters most, so ending the twice a year switch is the real win. Each clock change can throw off your circadian rhythm for days. Until Congress settles it, a steady wake time, morning light, and a cool bedroom are the best ways to ride it out.
Daylight Saving Time vs. Standard Time FAQs
Is It Daylight Saving Time or Standard Time Right Now?
Why Does Daylight Saving Time Affect Sleep More Than Standard Time?
Does Daylight Saving Time Impact Health Long Term?
How Long Does It Take to Adjust After a Time Change?
Does Every Region Observe Daylight Saving Time?
Disclaimer: This blog is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always talk to your healthcare provider about your symptoms, conditions, or treatment options.
