Clocks Fall Back: What the Time Change Does to Your Sleep

Last updated: October 2026

Most people do not get the extra hour of sleep the fall clock change promises: a review of the research found little evidence of extra sleep on the night of the change, and five days of earlier rise times afterward point to a net loss across the week (Harrison, 2013). In the United States, clocks fall back at 2 am on Sunday, November 1, 2026. This article covers what the research shows about the time change and sleep, then what pillow height changes during the hours you do sleep, and how a Pillowise fitting is chosen.

Key takeaways

In 9 adults wearing wrist activity monitors, both clock changes increased nighttime restlessness and lowered sleep quality (Lahti et al., 2008).
Across 185,419 hospital contacts in Denmark, new depressive episodes rose 11% after the fall change and faded over about 10 weeks (Hansen et al., 2017).
Pillowise is chosen from seven sizes using shoulder width, neck circumference and neck length, plus sleeping position and bed type.

Do you really gain an hour of sleep when clocks fall back?

The fall change is often described as a free extra hour. A review in Sleep Medicine Reviews found little evidence of extra sleep on the night of the change (Harrison, 2013).

The same review describes five consecutive days of earlier rise times after the autumn change. That pattern suggests a net loss of sleep across the week, not a gain (Harrison, 2013).

The American Academy of Sleep Medicine has taken the position that seasonal clock changes should end in favor of permanent standard time, which it describes as better aligned with human circadian biology (Rishi et al., 2020).

How does your body clock handle the change?

The body clock sets itself by daylight. In a survey of 55,000 people, the timing of sleep on free days followed the seasonal progression of dawn under standard time, but not under daylight saving time (Kantermann et al., 2007).

In the same team's second study, 50 people were tracked for eight weeks around each change. Sleep and activity adjusted readily to the autumn return to standard time, and the spring change was the harder one, especially for late chronotypes (Kantermann et al., 2007).

Adjusting is not the same as sleeping well through the change. A study of 9 adults wearing wrist accelerometers found both transitions increased nighttime restlessness. Morning types found the fall change more disturbing, and people with stronger seasonal patterns were affected more (Lahti et al., 2008).

Does the time change affect mood?

A Danish study of 185,419 hospital contacts for depression found an 11% increase in new depressive episodes after the change from summer time to standard time, fading over about 10 weeks. The spring change showed no such increase (Hansen et al., 2017).

The authors suggested that the sudden earlier sunset, marking the start of a long stretch of short days, may explain the finding. The study shows an association across a population, and low mood that persists belongs with a clinician.

Does lost sleep change how pain feels?

Sleep loss and pain sensitivity are linked in the lab. After one night without sleep, 14 healthy adults showed a generalized increase in pain sensitivity across a standardized set of sensory tests (Schuh-Hofer et al., 2013).

A week of earlier mornings is far less than a night without sleep, and no study has measured pain around the clock change. The finding explains why sleep belongs in the conversation for anyone managing neck or back discomfort.

What does pillow height change?

The clock decides when you sleep. The pillow is part of how your neck spends those hours. On your back, height changes the curve of the neck: in 16 adults without symptoms tested at 0, 10 and 20 cm, T1 slope and the C2 to C7 Cobb angle increased as the pillow rose, and 10 cm suited normal lordosis best (Kim et al., 2015).

Height also changes where pressure lands. A finite element study of 10 healthy participants lying on their backs, at heights from 110 to 170 mm, showed the pressure under the head and neck shifting with each change in height (Ren et al., 2016).

On your side, shoulder width sets the job. In a pilot study of 15 adults, a height equal to shoulder width produced lower sternocleidomastoid and trapezius activity, and higher comfort, than heights at half or one and a half times shoulder width (Jiao et al., 2025).

Why do generic pillows miss?

A standard contoured pillow, not fitted to the individual, performed no better than ordinary shapes in a randomized study of 106 side sleepers (Gordon et al., 2009). No single optimal pillow height can be specified, because it depends on four variables that differ from person to person: cervical alignment, body dimension, contact pressure, and muscle activity (Lei et al., 2021).

What we measure

Pillowise is a fitted cervical pillow that licensed healthcare providers measure and dispense, made in seven sizes.

Our sleep specialists take three measurements: shoulder width, neck circumference, and neck length. Combined with sleeping position and bed type, an algorithm identifies the best-fitting pillow from seven sizes.

Shoulder width is the measurement the EMG study found mattered most. A height matched to it produced the lowest neck and shoulder muscle activity during side sleeping (Jiao et al., 2025), and body dimension is what drives the individual optimum (Tian et al., 2025).

The size is chosen from those three measurements plus sleeping position and bed type, rather than from a single stock height. Pillowise pillows are made from premium Dutch memory foam, OEKO-TEX Standard 100 certified, with a uniform cervical height.

Scope of the evidence

The clock change studies are observational, and the accelerometer study followed only 9 people. No study has tested a pillow for adjusting to the time change, and no study has tested a Pillowise pillow. Reviews of pillow outcomes are mixed: the most recent screened 29,091 records, included five studies covering 239 patients, and found no clear advantage for any pillow type (Ghosh et al., 2025).

For providers

The first week of November is a natural point to ask patients about sleep timing. Ask whether their wake time has shifted and how they are sleeping, alongside the questions you already ask about position and pillow. Morning types in the accelerometer study found the fall change more disturbing (Lahti et al., 2008).

A fitted pillow extends the work of the visit into the hours between visits, alongside the exercise, manual therapy, and other care you are already delivering. Staff training runs 15 to 30 minutes by Teams or Zoom, any trained staff member can take the measurements, and returns and exchanges are handled by Pillowise directly. To offer fittings in your practice, register your practice as a Pillowise provider.

Common questions

When do clocks fall back in 2026?

In the United States, clocks fall back one hour at 2 a.m. on Sunday, November 1, 2026. Hawaii and most of Arizona stay on standard time all year and do not change.

How can I prepare for the time change?

Plan for the days after the change, not only the night itself. The review found the sleep loss comes from earlier rise times across the following five days (Harrison, 2013). Morning daylight matters too, since daylight is the signal the body clock uses to set itself (Kantermann et al., 2007). If sleep problems continue past the first few weeks, raise them with your provider.

Can a pillow help me adjust to the time change?

No study has tested a pillow for adjusting to the clock change, and a pillow does not reset your body clock. What a fitting settles is the height your neck rests at during the hours you do sleep, chosen from your measurements rather than from a single stock height.

Is a contoured pillow from a store enough?

Not reliably. A standard contoured pillow, not fitted to the individual, performed no better than ordinary shapes in a randomized study of 106 side sleepers (Gordon et al., 2009), and no single optimal height can be specified because it depends on four variables that differ from person to person (Lei et al., 2021). A contour helps only if its height matches the person using it. That is what the fitting settles, in a provider's office.

Find a Pillowise provider or become one

Pillowise pillows are clinically measured and dispensed exclusively through licensed healthcare providers as part of broader sleep, posture, and recovery education.

To locate a Pillowise provider near you, visit: Find a Reseller

Licensed healthcare providers interested in offering Pillowise may register here: Become a Reseller

References

Ghosh, S. K., Goyal, M., & Goyal, K. S. (2025). Effect of pillow on pain, disability and sleep quality in patients with chronic neck pain: A systematic review. Rehabilitación, 59(3), 100922. https://doi.org/10.1016/j.rh.2025.100922

Gordon, S. J., Grimmer-Somers, K., & Trott, P. (2009). Pillow use: The behaviour of cervical pain, sleep quality and pillow comfort in side sleepers. Manual Therapy, 14(6), 671-678. https://doi.org/10.1016/j.math.2009.02.006

Hansen, B. T., Sønderskov, K. M., Hageman, I., Dinesen, P. T., & Østergaard, S. D. (2017). Daylight savings time transitions and the incidence rate of unipolar depressive episodes. Epidemiology, 28(3), 346-353. https://doi.org/10.1097/EDE.0000000000000580

Harrison, Y. (2013). The impact of daylight saving time on sleep and related behaviours. Sleep Medicine Reviews, 17(4), 285-292. https://doi.org/10.1016/j.smrv.2012.10.001

Jiao, R., Xiao, W., Wang, M., Yu, S., & Li, H. (2025). The impact of pillow height on neck muscle activity: A pilot study. Sleep and Breathing, 29(1), 40. https://doi.org/10.1007/s11325-024-03219-6

Kantermann, T., Juda, M., Merrow, M., & Roenneberg, T. (2007). The human circadian clock's seasonal adjustment is disrupted by daylight saving time. Current Biology, 17(22), 1996-2000. https://doi.org/10.1016/j.cub.2007.10.025

Kim, H. C., Jun, H. S., Kim, J. H., Ahn, J. H., Chang, I. B., Song, J. H., & Oh, J. K. (2015). The effect of different pillow heights on the parameters of cervicothoracic spine segments. Korean Journal of Spine, 12 (3), 135-138. https://doi.org/10.14245/kjs.2015.12.3.135

Lahti, T. A., Leppämäki, S., Lönnqvist, J., & Partonen, T. (2008). Transitions into and out of daylight saving time compromising sleep and the rest-activity cycles. BMC Physiology, 8 , 3. https://doi.org/10.1186/1472-6793-8-3

Lei, J.-X., Yang, P.-F., Yang, A.-L., Gong, Y.-F., Shang, P., & Yuan, X.-C. (2021). Ergonomic consideration in pillow height determinants and evaluation. Healthcare, 9 (10), 1333. https://doi.org/10.3390/healthcare9101333

Ren, S., Wong, D. W.-C., Yang, H., Zhou, Y., Lin, J., & Zhang, M. (2016). Effect of pillow height on the biomechanics of the head-neck complex: Investigation of the cranio-cervical pressure and cervical spine alignment. PeerJ, 4 , e2397. https://doi.org/10.7717/peerj.2397

Rishi, M.A., Ahmed, O., Barrantes Perez, J.H., Berneking, M., Dombrowsky, J., Flynn-Evans, E.E., Santiago, V., Sullivan, S.S., Upender, R., Yuen, K., Abbasi-Feinberg, F., Aurora, R.N., Carden, K.A., Kirsch, D.B., Kristo, D.A., Malhotra, R.K., Martin, J.L., Olson, E.J., Ramar, K., Rosen, C.L., Rowley, J.A., Shelgikar, A.V., & Gurubhagavatula, I. (2020). Daylight saving time: An American Academy of Sleep Medicine position statement. Journal of Clinical Sleep Medicine, 16 (10), 1781-1784. https://doi.org/10.5664/jcsm.8780

Schuh-Hofer, S., Wodarski, R., Pfau, D. B., Caspani, O., Magerl, W., Kennedy, J. D., & Treede, R. D. (2013). One night of total sleep deprivation promotes a state of generalized hyperalgesia: A surrogate pain model to study the relationship of insomnia and pain. Pain, 154 (9), 1613-1621. https://doi.org/10.1016/j.pain.2013.04.046

Tian, S., Yao, C., Wang, Y., Cao, X., Sun, Y., Wang, L., & Fan, Y. (2025). The individualized optimal pillow height and neck support design for side sleepers. Medical and Biological Engineering and Computing, 63 (2), 535-544. https://doi.org/10.1007/s11517-024-03204-x