If you’re not in Arizona, you might be feeling the effects of daylight saving time this week. The shift can be a bit rough. Even if you’re trying to stay in the shade, the natural light is still stronger than what you get indoors. Our bodies really thrive on a cycle of bright days and dark nights to stay in tune with their natural rhythm.
I actually didn’t experience that typical grogginess on Monday morning, which is nice. But, studies indicate that the clock change can lead to an uptick in car accidents, workplace injuries, and even heart attacks for several days after. Not ideal, right?
However, perhaps the crux of the issue isn’t just changing the clock. It feels like modern life continually drags us away from the natural cycles our bodies are accustomed to. I mean, let’s be honest: our biological rhythms are more about sunlight than about how we measure time.
Almost every organ in our bodies has its own internal timer, which we call circadian rhythm. This system works on a roughly 24-hour cycle tied to the sun’s schedule. For most of our history, this rhythm dictated our daily activities—we woke up with the sunrise, worked in natural light, then wound down as the sun set.
But then came electricity and screens, and before we knew it, those natural signals began to fade. Now, many researchers believe our modern lifestyle puts us in a constant state of disrupted circadian rhythm. This disruption doesn’t just mess with our sleep, but can impact our overall health too.
It’s not exactly cutting-edge science either; many people just haven’t discovered this simple and free solution yet because it’s not something you can package into a pill, and, well, most doctors aren’t even trained in it. But that’s starting to change.
The principles behind circadian health are quite uncomplicated. The more we harmonize our daily lives with the sun’s natural rhythms, the better our bodies function. If we resist these rhythms, we ultimately pay a price. This isn’t some trendy, new-age concept; it’s basic biology.
Our eyes are designed to detect various wavelengths of light, which send signals to the brain, triggering hormonal changes that influence everything from alertness and sleep to metabolism, mood, and immune function. In essence, light tells our bodies what time it is.
So, capturing sunlight—how and when you do it—is more crucial than many realize. You don’t need to make drastic lifestyle changes either. Let’s start simple. One tip that’s often overlooked: lose your sunglasses.
1. Sunrise—The most critical light of the day
The first light of day is perhaps the most potent circadian cue. Morning light, rich in red wavelengths, triggers processes in your brain that signal the start of the day. It wakes you up, gets your metabolism going, and around 12 hours later, helps prepare your body for sleep.
A little experiment you can try: step outside for 15-20 minutes right at sunrise. If possible, ditch the sunglasses and just let your eyes take in that morning light—cloudy days still offer those circadian signals. Personally, I like to ponder Bible verses while enjoying the beauty that surrounds me.
2. UVA Window in the Morning
About an hour after sunrise, another vital type of light becomes more apparent—UVA light. While it’s not as intense as UVB light, which peaks later in the day, morning UVA has significant biological benefits. Studies suggest exposure can help balance hormones, boost mood, and get your digestive system primed for the day.
So, take a 20-30 minute walk outside around this time. Just soak up that natural light.
3. Daytime Vitamin D Window
After your sunrise and UVA walk, you might be feeling pretty accomplished, thinking you’ve soaked up enough vitamin D. Not quite. Your body only produces vitamin D when your skin gets UVB light, which hits its peak around noon.
This varies a lot depending on the season and your location. In winter, if you’re not in a southern state, you might miss out on UVB for weeks. Remember, sun exposure during the day is the only natural way to generate vitamin D—not supplements. Interestingly, medicine often discourages sunlight, which is a shame.
Try this: Increase your midday sun exposure gradually. Start with just a few minutes of direct sunlight to help prime your skin. You can often build up what researchers call a “solar callus,” basically a way your skin can adapt.
4. Bright Daylight All Day
Sunlight is not one-size-fits-all. It presents a spectrum throughout the day. There’s more red in the morning and evening, more blue light during the day, each sending different messages to your body. The takeaway? Spend more time outdoors.
If you can, even sitting outside in the shade is vastly healthier than being inside. We really do require bright days and dark nights to maintain our internal rhythm.
Here’s a thought: During your workday, sneak outside for just a minute more—whether it’s for a coffee break or any other excuse. Why not take those meetings outdoors or even just step out with your laptop?
5. Sunset—Your Body’s Evening Signals
Just as sunrise signals the start of the day, sunset helps confirm its end. The soft light of dusk indicates to your body that nighttime is approaching. However, modern life complicates this with bright artificial lights.
Screens and LED bulbs emit blue light—basically a daylight signal to your brain—which can slow melatonin production and affect your sleep.
So, watch the sunset, spend a few minutes outside during that time, and then consider dimming your indoor lights afterward. Soft lamps work much better than harsh overhead lighting. Reading a book or even candlelit baths can contribute to a calming evening routine.
By integrating small changes like these, you can gradually sync your body clock with nature again. Before the advent of electric lights and screens, the sun was the natural orchestrator of human life. Our bodies haven’t forgotten that rhythm.
Embracing it may lead us back to something modern life has often missed—living spiritually and physically according to light. There are some useful apps, like MyCircadian or Circadian, to help you track sunlight in your area.
It’s fascinating to think that our bodies are designed to resonate with the sun’s rhythm; for many, this realization can lead to meaningful changes in health and well-being.
