Daylight saving time ends at 2 a.m. on Sunday, Nov. 1, 2026. The clocks go back to 1 a.m., which means one extra hour that night and then a stretch of weeks when the Front Range gets dark before most people leave work. If you already feel like you are dragging by mid-afternoon, the time change tends to make it obvious. This article covers what the change does, what usually sits behind fatigue, the sleep habits that make a measurable difference and the signs that it is time to stop guessing and get checked.
What the fall time change actually does
The National Institute of Standards and Technology, which provides official time to the United States, lists the 2026 daylight saving period as March 8 through Nov. 1, with both changes at 2 a.m. local time. In the fall the 1 a.m. hour repeats, so the night is an hour longer. Most Coloradans experience the switch the next week rather than that night: the morning light comes earlier for a while, but sunset moves an hour earlier all at once, and evenings that were dusky become dark. People who commute home in daylight in October are commuting home in the dark by the second week of November. That is a schedule change for your body as much as your calendar, and it lands right when winter-pattern seasonal mood changes typically begin.
Tired, or something more?
MedlinePlus, the National Library of Medicine’s consumer health site, defines fatigue as a feeling of weariness, tiredness or lack of energy, and separates it from drowsiness, which is the urge to sleep. The distinction matters. A person who falls asleep the moment they sit down has a different problem from one who sleeps eight hours and still wakes up flat. MedlinePlus also notes that fatigue is usually not caused by a serious disease, which is reassuring, but its list of common causes is long: anemia and iron deficiency, an underactive or overactive thyroid, diabetes, sleep disorders such as insomnia and sleep apnea, depression and grief, persistent pain, and a number of everyday medications, including antihistamines and some blood pressure drugs. Alcohol is on the list too. Fatigue that lasts at least six months and does not improve with rest gets its own name, chronic fatigue syndrome.
One more item from that page is worth repeating in a state that runs on coffee: stimulants like caffeine are not effective treatments for fatigue, and they can make the problem worse when you stop them. If your energy depends on the third cup, that is information, not a solution.
The sleep habits that help most
The Centers for Disease Control and Prevention recommends seven or more hours of sleep a night for adults 18 to 60, eight to 10 hours for teens and nine to 12 hours for school-age kids. Its list of habits is short and specific: go to bed and get up at the same time every day, keep the bedroom quiet, relaxing and cool, put devices away at least 30 minutes before bed, skip caffeine in the afternoon and evening, avoid large meals and alcohol close to bedtime, and exercise regularly. The week of the time change is a good time to hold the schedule steady rather than sleeping in on the extra hour; a consistent wake time is the single habit that anchors the rest.
When the season itself is the problem
The National Institute of Mental Health describes winter-pattern seasonal affective disorder as a form of depression that begins in late fall or early winter and lasts about four to five months. Fatigue is one of its core symptoms, alongside oversleeping, overeating with a craving for carbohydrates and pulling away from friends. It is more common in women and in people who live farther north, where winter days are shorter. NIMH lists light therapy, talk therapy and medication as the main treatments and notes that study results on vitamin D are mixed. Its advice is plain: if you notice significant seasonal changes in your mood or behavior, talk to a health care provider. Anyone who is struggling can call or text 988 at any hour.
What a real fatigue workup looks like
MedlinePlus says to schedule a visit for unexplained fatigue, especially with fever, unintended weight loss or regular sweats; for constipation, dry skin, weight gain or feeling cold all the time; for waking many times a night; for frequent headaches; or for feeling sad or unable to sleep. Confusion, dizziness, blurred vision, very little urine, or sudden swelling and weight gain call for a same-day call. At the visit, expect questions about your history, habits and mood, an exam that pays attention to the heart, lymph nodes, thyroid and abdomen, and possibly blood work for anemia, blood sugar, inflammation and infection, plus kidney, liver and thyroid function tests and a urinalysis.
In Fort Collins, Nomadic Naturopathic frames the same problem around the pattern rather than the symptom. Dr. Danny Dowling, ND, writes on the practice’s fatigue and low energy care page that persistent fatigue is not treated as a single symptom with a single explanation. The evaluation he describes builds an energy timeline (when it started, how it changed, what time of day it hits), reviews sleep and recovery, looks at related symptoms together, and orders testing when clinically appropriate based on that history rather than running the same panel on everyone. The page asks new patients to bring previous labs, records and a list of medications and supplements, which is good advice for any fatigue visit, anywhere. Disclosure: Nomadic Naturopathic is a Holland Health Marketing client. If you are weighing a naturopathic doctor against a conventional one, our guide to how naturopathic doctors are registered in Colorado explains what an ND can and cannot do here.
A short plan for the next three weeks
Hold your wake time steady through Nov. 1 instead of banking the extra hour. Get outside in the morning while the light is still early. Move the last coffee before noon for two weeks and see what changes. If you are still flat after that, or if any of the symptoms above are part of the picture, book the visit and bring your old labs. Fatigue is common and usually fixable, but only once someone finds the cause.
Sources
- National Institute of Standards and Technology: Daylight Saving Time
- MedlinePlus: Fatigue
- CDC: About Sleep
- National Institute of Mental Health: Seasonal Affective Disorder
- Nomadic Naturopathic: Fatigue and Low Energy Care in Fort Collins
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This is general information, not medical advice.
