There's a point every autumn when I suddenly notice how early the sun is setting. It might happen when I'm finishing work and realize it's already getting dark, or when an evening walk that felt perfectly timed a few weeks earlier now has to happen before dinner. The change seems gradual until one day it doesn't, and I find myself wondering where all the daylight went.

I enjoy so many things about this time of year. The cooler mornings, the changing leaves, the way the sunlight looks softer in the late afternoon. But I also notice how easily my daily routine can shift as the days get shorter. It's tempting to stay inside a little longer in the morning, especially when it's cold, and by the time the afternoon gets busy, the opportunity to spend time outdoors may have passed.

It got me thinking about how much natural light we're actually getting during the day. Not just in autumn, but throughout the year. Many of us spend hours working indoors, commuting, shopping, or moving between buildings without giving much thought to how little time we spend outside.

We talk quite a bit about getting enough sleep, eating well, and moving our bodies. But perhaps we should also be paying attention to something that's been part of our daily lives all along: daylight.

Even with all the technology that shapes our schedules, our bodies continue to respond to the natural cycle of light and darkness. We have an internal timing system, often called our circadian rhythm, that helps coordinate when we feel awake, when we become sleepy, and how different processes in the body function throughout the day.

According to the National Institute of General Medical Sciences, light and darkness are among the strongest influences on our circadian rhythms. These rhythms help regulate sleep patterns, hormone release, appetite, digestion, and body temperature.

One of the ways our bodies respond to changing light is through melatonin, a hormone involved in the sleep-wake cycle. As evening approaches and light levels decrease, melatonin production generally increases, helping prepare us for sleep. Light exposure helps signal when it's time to be awake.

That doesn't mean we need to understand every detail of our biological clocks to take care of ourselves. But it does help explain why our surroundings matter. We weren't designed to experience the same lighting conditions at every hour of the day, yet modern life often keeps us under artificial lights from morning until bedtime.

The amount, timing, and brightness of the light we're exposed to can all influence our internal sense of day and night. And sometimes, small changes in our routines can help us create a more natural distinction between the two.

Think about how you usually begin your day. Do you open the curtains right away, or do you move from the bedroom to the kitchen and then to your computer without spending much time near a window? If you work from home, it's entirely possible to be halfway through the morning before you've stepped outside.

Morning light can be a useful signal to our internal clock that the day has begun. The Centers for Disease Control and Prevention explains that bright light shortly after waking can help promote alertness and support the timing of our sleep-wake cycle.

It's one reason a short morning walk can feel like such a pleasant way to begin the day. You're getting some movement, breathing fresh air, noticing what's happening around you, and experiencing natural daylight at the same time.

But you don't need to become someone who gets up before sunrise or commits to an elaborate morning routine. If you already enjoy walking, you might move your walk a little earlier. If mornings are busy, perhaps you could step outside with your coffee for a few minutes or take a short break outdoors once your day is underway.

Even opening the curtains and spending time near a bright window can make your indoor environment feel more welcoming, although outdoor daylight is generally much brighter than light inside a building.

The point isn't to follow another wellness rule. It's simply to recognize that daylight is an important part of our environment, and we can make a little more room for it when our schedules allow.

It's easy to underestimate how much of our day happens inside. We may wake up in a dim bedroom, eat breakfast under kitchen lights, spend hours at a desk, and then settle in for the evening under more artificial lighting.

And even when we have windows, that doesn't necessarily mean we're getting the same light exposure we would experience outdoors.

Researchers studying the effects of light on human sleep and wakefulness have found that brightness, timing, duration, and the type of light all influence how our bodies respond. Natural daylight provides a changing pattern of light across the day, while our indoor environments often remain relatively consistent.

Of course, not everyone has the same opportunities to get outside. Work schedules, caregiving responsibilities, mobility limitations, weather, and where we live can all affect how much daylight we experience.

That's why I think it's more helpful to look for opportunities than to create another rigid recommendation. Perhaps you can take a phone call outside, sit near a window while having lunch, or choose a walking route that gives you a little time in the daylight. On a cold afternoon, even a brief trip outdoors might be more realistic than a long walk.

The goal isn't to spend every available moment outside. It's to notice whether natural light has gradually disappeared from our daily routines and consider how we might bring some of it back.

For some people, the arrival of autumn and winter brings more than a change in routine. They may notice shifts in their energy, sleep, motivation, or mood as daylight hours decrease.

The National Institute of Mental Health explains that some people experience seasonal changes in mood, while others develop seasonal affective disorder, or SAD, a form of depression that follows a recurring seasonal pattern. Winter-pattern SAD often begins in late fall or early winter and improves during the spring or summer.

It's important not to assume that every tired afternoon or change in mood is caused by a lack of sunlight. Sleep habits, stress, health conditions, and many other factors can affect how we feel. And while spending time outdoors may be a helpful part of a daily routine, it isn't a substitute for treatment when someone is experiencing depression.

If seasonal changes are significantly affecting your mood, sleep, or ability to manage everyday activities, talking with a healthcare professional is a good place to begin. Treatments for seasonal affective disorder may include psychotherapy, medication, or carefully timed light therapy, depending on individual needs.

I think this distinction matters because wellness conversations can sometimes make complex health concerns sound as though they have simple solutions. Daylight is important, but we don't need to promise that a morning walk will fix everything to appreciate the benefits of getting outside.

It's easy to underestimate how much of our day happens inside. We may wake up in a dim bedroom, eat breakfast under kitchen lights, spend hours at a desk, and then settle in for the evening under more artificial lighting.

And even when we have windows, that doesn't necessarily mean we're getting the same light exposure we would experience outdoors.

Researchers studying the effects of light on human sleep and wakefulness have found that brightness, timing, duration, and the type of light all influence how our bodies respond. Natural daylight provides a changing pattern of light across the day, while our indoor environments often remain relatively consistent.

Of course, not everyone has the same opportunities to get outside. Work schedules, caregiving responsibilities, mobility limitations, weather, and where we live can all affect how much daylight we experience.

That's why I think it's more helpful to look for opportunities than to create another rigid recommendation. Perhaps you can take a phone call outside, sit near a window while having lunch, or choose a walking route that gives you a little time in the daylight. On a cold afternoon, even a brief trip outdoors might be more realistic than a long walk.

The goal isn't to spend every available moment outside. It's to notice whether natural light has gradually disappeared from our daily routines and consider how we might bring some of it back.

One of the things I like about spending time outdoors is that it often gives us something beyond the reason we went outside in the first place. We might head out for a walk because we want some movement, but end up noticing the changing trees, hearing birds in the distance, or running into a neighbor we haven't seen in a while.

Those ordinary experiences can make being outdoors feel less like a task and more like something we genuinely enjoy.

In the fall, perhaps that means taking advantage of the brighter part of the afternoon instead of waiting until evening. In winter, it might mean stepping outside during lunch or making a point of getting some daylight on weekends. And during the warmer months, we can continue enjoying outdoor time while being mindful of heat, sun exposure, and our own comfort.

You don't have to spend long periods in direct sunshine to appreciate natural light. Shade, appropriate clothing, and sun protection still matter, particularly when ultraviolet exposure is high. We're talking about supporting a healthy daily light-dark rhythm, not trying to maximize sun exposure or get a tan.

What matters most is finding a rhythm that works with your life rather than against it.

As much as we benefit from light during the day, darkness also plays an important role in our daily rhythm. Our bodies use the changing light around us as one of the signals that help distinguish daytime from nighttime.

The CDC notes that bright light in the hours before bedtime can make it harder to fall asleep, while dimmer evening lighting may help support a more restful transition toward sleep.

That doesn't mean you need to sit in a dark room after dinner or give up watching your favorite television show. But if you've noticed that you're having difficulty winding down, it may be worth paying attention to the brightness of your surroundings.

You might lower the lights in the evening, reduce unnecessary screen brightness, or create a quieter bedtime routine. These are small adjustments, but they can help establish a clearer difference between the active part of your day and the time you're preparing to rest.

I like thinking of daylight and darkness as partners rather than opposites. We need periods of light to help us feel awake and connected to the world around us, and we need opportunities for darkness and rest as the day comes to an end.

There's something reassuring about the idea that supporting our well-being doesn't always require buying something, following a new program, or changing our entire routine. Sometimes it begins with noticing what's already around us.

The light coming through the kitchen window. The few minutes we could spend outside before starting work. The afternoon walk we keep putting off until it's too late. These moments are easy to overlook, especially when our days feel full.

As the seasons change, perhaps we can become a little more aware of how much daylight we're experiencing and how our routines shift along with it. We may find that moving a walk earlier, taking a break outdoors, or simply opening the curtains becomes something we look forward to.

We can't make the autumn days longer, but we can be more intentional about enjoying the daylight we have. And sometimes that's a lovely reason to step outside.

Pay attention to when you first experience natural daylight each morning. Is it shortly after waking, during your commute, or not until much later in the day? Then look for one opportunity to spend a little more time outside while it's light, whether that's a short morning walk, a few minutes in the garden, or a break during lunch.

Try making that small change a few times this week and notice how it fits into your day. There's no need to track every minute or turn it into another habit you have to perfect. You're simply becoming more aware of the light around you and finding ways to enjoy it.

Thoughtful, practical ideas for feeling well in real life. Join the Aligned & Well newsletter for research-informed guidance on nourishment, movement, mindful living, and seasonal well-being.

National Institute of General Medical Sciences. Circadian Rhythms. An explanation of how light and darkness influence the body's biological clocks and daily rhythms. https://www.nigms.nih.gov/education/fact-sheets/Pages/circadian-rhythms

Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health. (2023). Effects of Light on Circadian Rhythms. Guidance on the relationship between light exposure, alertness, and sleep timing. https://archive.cdc.gov/www_cdc_gov/niosh/emres/longhourstraining/light.html

National Institute of Mental Health. Seasonal Affective Disorder. Information about seasonal mood changes, symptoms, and evidence-based treatment options. https://www.nimh.nih.gov/health/publications/seasonal-affective-disorder

Prayag, A. S., Münch, M., Aeschbach, D., Chellappa, S., & Gronfier, C. (2019). Light Modulation of Human Clocks, Wake, and Sleep. Clocks & Sleep, 1(1), 193–208. A research review of how light characteristics influence circadian timing, wakefulness, and sleep. https://pmc.ncbi.nlm.nih.gov/articles/mid/NIHMS1047807/