Digital sunset: screens off before bed

A digital sunset means switching off your screens at a set time before bed, usually 30 to 60 minutes ahead. It asks you to pick that time, stick to it and fill the gap with something calm that does not glow.

Why people do it

Most people use a digital sunset to fall asleep more easily and to feel less wired at night. Screen time before bed tends to stretch on longer than planned, and a fixed cutoff gives the evening a clear end point. Adults need 7 or more hours of sleep a night, and a regular wind-down is one way to protect that time.

The habit is modern. It grew out of everyday sleep-hygiene advice from public health sources, which recommend turning devices off before bed, keeping phones and TVs out of the bedroom and relaxing before you lie down.

It works on two levels. For the body, it is about light and your internal clock, which uses light reaching your eyes to decide when to make you sleepy. For the mind, it is a chance to stop taking in news, messages and feeds, so your thoughts can slow down before sleep. If you want to see how rest and mood shape each other, our guide on how sleep and mood connect goes further.

What the evidence says

Evening screen use is very common: in one survey of 1,508 US adults, 90% used electronics within an hour of bed at least a few nights a week. The reason light matters is well described. The US National Institute of General Medical Sciences explains that a master clock in the brain, the suprachiasmatic nucleus, sets melatonin production according to light reaching the eyes, and that night-time device light is one of the things that can disrupt this rhythm. A 2015 study in Proceedings of the National Academy of Sciences found that reading a light-emitting e-reader before bed, compared with a printed book, led to taking longer to fall asleep, less evening sleepiness, lower melatonin, a later body clock and lower alertness the next morning. The authors pointed to short-wavelength-enriched light. What this research does not do is test a digital sunset routine as a whole. The case for the habit rests on that light research and on standard advice from the US Centers for Disease Control and Prevention (CDC) and MedlinePlus, rather than on trials of the routine itself.

Variations

• The 30-minute version. On busy nights, use the shorter window the CDC mentions, at least 30 minutes before bed. It suits people who find a full hour hard to protect.
• A weekly screen-free evening. Once a week, switch off from dinner onward. This suits people who want a bigger reset than a nightly routine gives.
• Night settings as a fallback. If you must use a screen late, dim it and turn on night mode. Treat this as a backup for unusual nights, not a replacement for switching off.
• Pairing with slow breathing. Once the screens are off and you are in bed, add a few minutes of slow breathing. It suits people whose minds stay busy after the lights go out.

Common mistakes

• Keeping the phone by the bed “just for the alarm.” A phone within reach is easy to pick up again. Charge it in another room and use a basic alarm clock if you need one.
• Swapping the phone for an e-reader or tablet. Backlit reading devices were the very thing compared with print in the 2015 study. Choose a printed book instead.
• Letting the sunset time drift later. Ten minutes here and there soon becomes an hour. Use an alarm for your cutoff and keep regular bed and wake times.
• Leaving the gap empty. Without a plan, the urge to check the phone wins. Line up a bath, music or a short evening review so the time feels like a real wind-down.
• Lying awake for a long time. Tossing for an hour can make bed feel stressful. If you are still awake after about 20 minutes, get up and do something relaxing, then try again.

If your sleep problems keep going despite these changes, check with a healthcare provider, and bring a sleep diary to help that conversation.