What's the best time to go to bed? Why consistency beats a magic hour

The best time to go to bed is the time that gives you 7 to 8 hours of sleep before you need to get up, kept the same every night. One large study did link falling asleep between 10 and 11 pm to the lowest heart disease risk, but it can't prove the clock time itself matters. The stronger and more consistent finding is that a regular schedule is good for you, so working back from a fixed wake-up time is the simplest way to choose your bedtime.

Is there a best time to go to bed?

There's no proven perfect bedtime, but one large study points to 10 to 11 pm. In 2021, researchers in the UK published an analysis in European Heart Journal - Digital Health using data from 103,712 UK Biobank participants who wore a wrist activity tracker for seven days. The trackers recorded when each person fell asleep and woke up. Over an average of about 5.7 years, 3,172 of them developed cardiovascular disease.

Falling asleep between 10:00 and 10:59 pm was linked to the lowest rate of new cardiovascular disease. After the researchers accounted for sleep duration, sleep irregularity and established risk factors, other sleep times were linked to higher risk:

Two details matter. The link was stronger in women, and in men only falling asleep before 10 pm was significantly linked to higher risk. And this was an observational study, so it shows an association, not that changing your bedtime would change your heart health. The authors described their findings as suggesting the possibility of a relationship.

Why does a consistent bedtime matter more?

A consistent bedtime matters because sleep regularity has strong links to health in large studies, and it's something you can control. Regularity means going to sleep and waking up at similar times from one day to the next.

A 2024 study in Sleep calculated a sleep regularity score for 60,977 UK Biobank participants from more than 10 million hours of tracker data. People in the four more regular groups had a 20% to 48% lower risk of dying from any cause during the follow-up period than the least regular group. Regularity was a stronger predictor of death from any cause than sleep duration.

A 2025 study in the Journal of Epidemiology and Community Health followed 72,269 UK adults for 8 years. Irregular sleepers had a 26% higher risk of major cardiovascular events, such as heart attack, heart failure and stroke, than regular sleepers. For moderately irregular sleepers, getting the recommended amount of sleep offset that higher risk. For the most irregular sleepers, it didn't.

These are observational studies too. Still, they line up with long-standing advice. The National Heart, Lung, and Blood Institute recommends going to bed and waking up at the same time every day, and keeping the difference between weeknights and weekends to no more than about an hour. It says staying up late and sleeping in on weekends can disrupt your body clock. Our guide to whether you can catch up on sleep covers what weekend lie-ins can and can't do.

What role does your body clock play?

Your body clock, or circadian rhythm, sets when you naturally feel sleepy, and it's why the same bedtime doesn't suit everyone. The National Institute of General Medical Sciences explains that a master clock in the brain, called the suprachiasmatic nucleus, controls melatonin production based on how much light your eyes receive. In the evening, it tells the brain to make more melatonin, which makes you sleepy. Light and dark have the biggest influence on these rhythms.

People differ in their natural timing, known as chronotype. Some are morning types and some are evening types. A 2018 study of 433,268 adults in the UK Biobank found that people who described themselves as definite evening types had more health conditions and a 10% higher risk of death over about 6.5 years than definite morning types. The authors suggested that part of the reason may be chronic misalignment between the body clock and the timing of work and social life.

That's a reason to work with your chronotype where you can, not to force a 10 pm bedtime if you're wide awake then. Since light has the biggest influence on your body clock, bright mornings and dim evenings work with it rather than against it. Our guide to daylight saving time and sleep shows how even a one-hour shift can unsettle the clock.

How do you work out your bedtime from your wake-up time?

Work out your bedtime by starting from the time you have to get up, then counting back the sleep you need. The NHLBI says adults 18 and older need 7 to 8 hours of sleep a day.

1. Pick a wake-up time you can keep every day, including weekends, or within about an hour of it.
2. Count back 7 to 8 hours. If you wake at 6:30 am, that's 10:30 to 11:30 pm.
3. Add a little time for falling asleep. If it usually takes you 15 minutes, lights out goes 15 minutes earlier.
4. Try it for a week or two. If you still feel tired in the day, move bedtime earlier in small steps.
5. Make your wind-down the same each night. If you snore or breathe through your mouth, that can include a nasal strip and mouth tape from the Titan Sleep System.

The NHS also recommends waking up and getting out of bed at the same time every day, and not sleeping in after a bad night. Our guide to how much sleep adults need explains the recommendations in more detail, and how to wake up without feeling groggy covers the other end of the night.

What makes it hard to keep a regular bedtime?

Several things make it hard to keep a regular bedtime, and some are easier to fix than others. Screens and bright light in the evening are one. The NHLBI suggests using the hour before bed for quiet time and avoiding bright artificial light from a TV or computer screen, because light may signal the brain that it's time to be awake.

Shift work is another. The NHLBI notes that shift workers may have schedules that conflict with their body clocks. Our guide to mouth tape for shift workers covers sleeping well at odd hours.

Broken sleep is a third. If snoring, a blocked nose or a dry mouth wakes you, a regular bedtime still leaves you short. The NHS links snoring to a blocked or narrow nose and to a mouth that falls open during sleep. A nasal strip lifts the sides of the nose to make breathing feel easier, and mouth tape keeps your lips closed so you breathe through your nose. The Titan Sleep System pairs the two, which makes it easy to add to the same routine every night. The research above is about sleep timing, not these products. Our guide to waking up tired covers other reasons a full night might not feel like one.

Mouth tape is only for adults who can breathe comfortably through the nose with the mouth closed. We don't recommend mouth tape for children.

When should you see a doctor?

You should see a doctor if you can't sleep at your chosen time despite good habits, or if you sleep enough and still feel exhausted. The NHS advises seeing a GP if changing your sleep habits hasn't helped insomnia, if you've had trouble sleeping for months, or if it's affecting your daily life.

Feeling very tired during the day can also be a sign of sleep apnoea. The NHS lists breathing that stops and starts while you sleep, gasping, snorting or choking noises, waking up a lot and loud snoring as other symptoms, and says to see a GP if you have the main ones. Strips and tape don't treat sleep apnea. A nose that's blocked most nights deserves a check too, and if you're pregnant, ask your midwife or doctor before trying strips or tape.

Our pick (paid partner): Titan Sleep System

If snoring or mouth breathing breaks up your nights, our pick is the Titan Sleep System. It's our recommendation, not the result of our own testing. No published study has tested these products, and the bedtime and heart research in this article isn't about them.

Titan describes it as TitanAir Nasal Strips and Titan Mouth Tape together as one nightly system. Titan says the strips are drug-free external nasal dilators with flexible, spring-loaded bands, placed just above the flare of the nostrils on the soft part of the nose. It says the tape is a bamboo silk strip worn horizontally across the lips, and suggests 20 to 30 minutes of daytime practice before the first night. Titan says both are third-party tested and certified PFAS-free, with a 30-night guarantee.

Read next

• How much sleep do adults need?
• Can you catch up on sleep?
• Sleep hygiene: the habits with the best evidence

* This content is for informational and educational purposes only and is not medical advice. It is not intended to diagnose, treat, cure or prevent any disease or health condition. Talk to a qualified healthcare provider about your health.