The Extra Hour Isn't the Problem

On Sunday, November 1, 2026, most of the United States will set the clocks back an hour and return to standard time. At 2:00 a.m., the clock becomes 1:00 a.m., and we get the famous "extra hour" that gets treated every fall like a small national gift.

For some people, it's a non-event. They sleep a little later on Sunday and barely notice.

Others notice something stranger. They get sleepy earlier in the evening. They wake up before the alarm. They find themselves staring at the clock at four or five in the morning, wide awake for no obvious reason.

The easy explanation is that the time change messed up their sleep. That's not quite what happened. The clock on the wall changed instantly. The clock inside your body didn't. Now the two have to find each other again.

To understand why that can cause early sleepiness and early waking, we need to talk about light, because light is the strongest signal your brain uses to figure out what time it is.

Your brain doesn't know what the clock says

Deep in your brain, in an area called the hypothalamus, sits a tiny cluster of nerve cells called the suprachiasmatic nucleus, or SCN. It's your body's master clock. It helps time hundreds of processes across the day: when you feel sleepy and alert, when your body makes melatonin and cortisol, your body temperature, your appetite and much of your metabolism.

The clock on your phone has no direct line to it. Light does.

Special cells in your eyes, which contain a light-sensitive pigment called melanopsin, respond to the light around you and send that information to the SCN. These cells play only a small role in actual vision. Their more important job here is telling your brain how bright the light is, what kind of light it is and when you're seeing it. That keeps your internal clock in sync with the outside world.

Light isn't the only signal. Exercise, meal times, activity and melatonin all play a part. But light is the strongest one in humans. That's why moving the clock an hour doesn't instantly move your body an hour. Your phone gets the update immediately. Your SCN waits for evidence.

In the fall, your body has to shift later

Here's a detail most explanations of daylight saving time leave out: spring and fall ask your body clock to move in opposite directions.

People generally handle shifting later more easily than shifting earlier, which is one reason the spring change tends to cause more obvious sleep problems. Studies that tracked sleep with wrist monitors found sleep got worse after the spring change, and a 2025 review likewise concluded that sleep problems are generally more noticeable in spring. That's good news: the fall change is usually the easier one.

But easier doesn't mean unnoticeable. A small study of the fall change found that people woke earlier, spent less time in bed and slept less overall afterward. Other research found more restless nights around both changes, with morning people seeming especially sensitive to the fall one.

That makes sense. If your body clock already runs early, suddenly relabeling the day an hour earlier makes the early-evening sleepiness and early waking even more noticeable.

Darkness at five o'clock isn't just in your head

When daylight saving time ends, the sun doesn't actually move. Our clocks do. The result is that sunrise and sunset suddenly happen about an hour earlier by the clock. For a lot of people, that means leaving work in the dark for the first time that year.

That loss of evening light matters, because when you see light changes what it does to your body clock:

That creates an odd problem after the fall change. Your body clock needs to move later to match the new time, but you suddenly get less natural light in the evening. At the same time, sunrise comes earlier by the clock, so you get more morning light, which tends to push your clock earlier. In other words, some of the most obvious advice can push in the wrong direction. That's what makes the fall sleep problem more interesting than "you gained an hour."

The early-bedtime trap

Say your normal bedtime is 11:00 p.m. A week before the change, there was still some daylight while you finished work, ate dinner, walked the dog or wound down your day. Then the clocks change, and by dinner it feels like night.

By eight or nine o'clock you feel unusually sleepy. That feeling is real. Your body hasn't caught up with the clock yet, and the early darkness adds to the sense that the day is over. So you go to bed. That's where the problem can snowball.

If you normally need seven or eight hours of sleep and suddenly go to bed much earlier, waking up earlier shouldn't be a surprise. Your body doesn't know you'd like the night to stretch until your alarm. It only knows you fell asleep earlier.

That's why some early waking after the fall change has less to do with being unable to sleep and more to do with moving your whole night earlier than you meant to. The answer isn't to fight sleep forever. It's to avoid turning a temporary wave of evening sleepiness into a permanent new bedtime before your body clock has caught up.

The catch with the usual "get morning light" advice

Morning daylight is great advice in lots of situations. It's one of the most reliable ways to support an earlier schedule, it helps people whose sleep has drifted late, and regular daytime light is important for your body clock in general.

But timing matters. If your body clock needs to shift later after the fall change, deliberately adding strong early-morning light can, in theory, push it the other way.

A 2024 study from researchers at the Icahn School of Medicine at Mount Sinai used a computer model to test how different light exposures affect adjustment after each time change. Their results are worth a look:

In the model, the morning walk sped up adjustment in spring, because morning light shifts the clock earlier. After the fall change, the same walk worked against the shift the body needed and kept it from fully adjusting.

The authors weren't saying morning walks are bad for you. Their point was that the same light can have opposite effects depending on which way your body clock needs to move. That's a lot more useful than just "get morning light." There's no single right light prescription without considering timing.

What to actually do after the clocks go back

For most healthy people, not much. Research suggests the fall change is generally easier than spring, and many people adjust pretty readily when returning to standard time. If you feel fine, there's no reason to turn the first week of November into a project.

But if you start getting sleepy much earlier than usual or waking much earlier than you want, a few adjustments make sense.

Keep your schedule close to the one you want

If you normally go to bed at 10:30 or 11:00, don't take a wave of sleepiness at 8:30 as a sign that your new bedtime is 8:30. Stay reasonably active in the evening and keep close to your normal schedule by the clock while your body catches up.

Likewise, try to keep your wake-up time steady rather than sleeping several hours late after one bad night. A consistent schedule gives your body clock something stable to sync with. The goal isn't military precision. It's avoiding big swings while your clock is already adjusting.

Use evening light on purpose, but gently

Because your body needs to shift later in the fall, some evening light can actually help during the adjustment. That doesn't mean staring at a bright screen at midnight. It means not turning your house into a cave at 5:30 p.m.

If the sun sets before dinner and you're getting sleepy hours early, keep your normal household lights on through the early evening to support the later schedule you're trying to keep. Then, as bedtime gets close, start dimming things.

That difference matters. Bright light in the early evening can shift your clock later, but bright light close to bedtime can also make you more alert and interfere with sleep. You want enough evening light to keep the whole night from sliding earlier. You don't need a stadium in the bedroom.

Don't overcorrect with intense early-morning light

If your specific complaint is that you're already waking too early after the fall change, I'd be careful about chasing bright light at the earliest possible moment. Normal daytime time outdoors is still healthy and important. What I wouldn't do is assume that more early-morning bright light will speed up your adjustment, because the model above suggests the opposite can happen in the fall.

Once your schedule has settled, regular daytime light outdoors is still one of the best ways to keep your body clock healthy. The point isn't to fear morning light. It's to stop pretending your clock responds to light the same way at every hour of the day.

Why some older adults notice it more

Many older adults will recognize this early-evening, early-morning pattern. As we age, our body clock tends to shift earlier. On average, older adults get sleepy earlier in the evening and wake earlier in the morning than younger adults, and sleep tends to get lighter and more broken up.

Exactly how aging changes the strength and flexibility of the body clock is more complicated than it's often made out to be, but the shift toward an earlier schedule is well established. Older adults also tend to have a harder time with sudden disruptions like jet lag and shift work.

So the fall change can push in the same direction that aging already has. If you were already getting sleepy at 9:00 p.m. and waking at 5:00 a.m., the time change can make both feel another hour earlier by the clock until your body adjusts. That doesn't necessarily mean anything is wrong. It's a reason to be especially careful not to let temporary early drowsiness keep pulling your bedtime earlier.

Caffeine matters, and so does the amount

The usual sleep advice says to stop caffeine six, eight or even ten hours before bed. That's a reasonable, cautious rule, but the research shows the amount matters as much as the timing.

A classic study found that 400 mg of caffeine (about four cups of brewed coffee) disrupted sleep even when taken six hours before bed. A newer study refined that picture by testing 100 mg and 400 mg at different times before sleep:

So the lesson isn't that everyone needs the same caffeine curfew. It's that the amount, the timing and your own sensitivity all matter. During the week after the change, I'd avoid using extra afternoon caffeine to push through the early-evening slump. You might solve an 8 o'clock sleepiness problem by creating an 11 o'clock insomnia problem.

Alcohol solves the wrong problem

Alcohol works the opposite way. It often helps you fall asleep faster, which is why people think a nightcap helps. But studies consistently show that alcohol gives you more solid sleep early in the night and more disrupted sleep in the second half. Recent reviews also link evening drinking to changes in sleep structure, more broken sleep and poorer sleep quality.

That's almost perfectly designed to make early waking worse. If you're already falling asleep too early and waking too early after the fall change, using alcohol to make yourself even sleepier in the evening solves a problem you didn't have.

Give the night a beginning, at the right time

I still like the idea of a predictable wind-down before bed. Dim the lights. Finish work. Let the room cool. Get away from whatever keeps you wired.

But timing matters. During the fall adjustment, I wouldn't start that routine at 6:30 just because it's dark outside. Keep your early evening feeling like early evening. Then, in the last hour or so before your normal bedtime, start winding down. Your body clock responds to patterns. You're teaching it where the evening ends, not just reacting to the sun going down early.

How long does it take to adjust?

You'll hear that your body adjusts to a one-hour change in a day, or an hour per day, or exactly a week. The evidence isn't that tidy. Studies have found everything from quick adjustment to changes lasting more than a week, and your natural sleep type and light exposure seem to matter.

The Mount Sinai model predicted about 10 to 14 days for two typical sleep types to fully adjust after the fall change if they kept their usual light routines. The authors were careful to say those were model predictions, not proof that everyone needs two weeks. Other research suggests people's actual sleep habits may adjust much faster.

That's why I wouldn't put a countdown on it. If your sleep shifts a little for several days and then settles, that's not surprising. If it's still significantly off weeks later, the time change becomes a less convincing explanation, and I'd start looking for something else.

Where a sleep formula fits

This is where I want to separate two different jobs. A sleep formula can't reset a mistimed body clock. CBD and CBN don't tell your SCN that it's now 10:00 p.m. instead of 9:00 p.m. Light, behavior and the timing of your sleep schedule do the heavy lifting there.

A formula belongs in a different category. Our Sleep formulas combine CBD with CBN: Sleep Oil contains 40 mg of CBD and 40 mg of CBN per dropper, and Sleep Gels contain 25 mg of each per gel. I think of them as tools to support the night itself, not tools to change when the night happens.

That distinction matters. If you're waking at four because you moved your bedtime two hours earlier after the clocks changed, taking more of a sleep product doesn't address what actually changed. Fix the timing first. If you use a sleep formula, use it consistently and as directed, rather than chasing individual bad nights at irregular times. A supplement should sit on top of a stable sleep routine. It shouldn't be asked to create one.

When the clock change stops being a good explanation

A few nights of off sleep around the time change is one thing. Ongoing insomnia is another. Talk to a doctor if:

• Early waking goes on for several weeks
• You wake up gasping or choking
• Someone tells you that you stop breathing in your sleep
• Daytime sleepiness gets bad enough to affect driving or work
• Early waking comes with a lasting change in mood

Waking too early can happen for lots of reasons that have nothing to do with daylight saving time: sleep apnea, restless legs, pain, medication side effects, alcohol, depression, body-clock disorders and other conditions. At some point, blaming the clocks becomes a way of avoiding the more useful question: why are you waking up? That deserves an answer.

The extra hour was never really the story

The fall time change gets described as a simple trade: we move the clock back and get an extra hour. Your body doesn't make the exchange that neatly. What actually changes is the relationship between the clock, the sun, your usual sleep schedule and the light reaching your eyes.

For most people, the adjustment is mild, and research suggests going back to standard time is generally easier on sleep than moving into daylight saving time in spring. For people who do notice a change, the answer isn't automatically more sleep, and it isn't automatically more morning light.

The clock on the wall moved in a second. Your body moves by degrees. That difference is the whole story.

Eric Dorninger, ND
Director of Research & Development, Blue Sky CBD