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Rishi MA, Cheng JY, Strang AR, Sexton-Radek K, Ganguly G, Licis A, Flynn-Evans EE, Berneking MW, Bhui R, Creamer J, Kundel V, Namen AM, Spector AR, Olaoye O, Hashmi SD, Abbasi-Feinberg F, Abreu AR, Gurubhagavatula I, Kapur VK, Kuhlmann D, Martin J, Olson E, Patil S, Rowley J, Shelgikar A, Trotti LM, Wickwire EM, Sullivan SS. Permanent standard time is the optimal choice for health and safety: an American Academy of Sleep Medicine position statement. J Clin Sleep Med 2024; 20:121-125. [PMID: 37904574 PMCID: PMC10758561 DOI: 10.5664/jcsm.10898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Accepted: 10/30/2023] [Indexed: 11/01/2023]
Abstract
The period of the year from spring to fall, when clocks in most parts of the United States are set one hour ahead of standard time, is called daylight saving time, and its beginning and ending dates and times are set by federal law. The human biological clock is regulated by the timing of light and darkness, which then dictates sleep and wake rhythms. In daily life, the timing of exposure to light is generally linked to the social clock. When the solar clock is misaligned with the social clock, desynchronization occurs between the internal circadian rhythm and the social clock. The yearly change between standard time and daylight saving time introduces this misalignment, which has been associated with risks to physical and mental health and safety, as well as risks to public health. In 2020, the American Academy of Sleep Medicine (AASM) published a position statement advocating for the elimination of seasonal time changes, suggesting that evidence best supports the adoption of year-round standard time. This updated statement cites new evidence and support for permanent standard time. It is the position of the AASM that the United States should eliminate seasonal time changes in favor of permanent standard time, which aligns best with human circadian biology. Evidence supports the distinct benefits of standard time for health and safety, while also underscoring the potential harms that result from seasonal time changes to and from daylight saving time. CITATION Rishi MA, Cheng JY, Strang AR, et al. Permanent standard time is the optimal choice for health and safety: an American Academy of Sleep Medicine position statement. J Clin Sleep Med. 2024;20(1):121-125.
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Affiliation(s)
| | | | - Abigail R. Strang
- Division of Pulmonary and Sleep Medicine, Nemours Children’s Hospital, Wilmington, Delaware
| | | | - Gautam Ganguly
- Neurology Consultants Medical Group, Whittier, California
| | - Amy Licis
- Department of Neurology, Washington University School of Medicine, St. Louis, Missouri
| | - Erin E. Flynn-Evans
- Fatigue Countermeasures Laboratory, Human Systems Integration Division, NASA Ames Research
| | | | - Raj Bhui
- University of British Columbia, Vancouver, British Columbia, Canada
| | - Jennifer Creamer
- Sleep Disorders Center at Walter Reed National Military Medical Center, Bethesda, Maryland
| | - Vaishnavi Kundel
- Division of Pulmonary, Critical Care, and Sleep Medicine, Icahn School of Medicine at Mount Sinai, New York, New York
| | | | - Andrew R. Spector
- Department of Neurology, Duke University School of Medicine, Durham, North Carolina
| | | | | | | | - Alexandre Rocha Abreu
- Miller School of Medicine/Universisty of Miami UHealth Sleep Program, Miami, Florida
| | - Indira Gurubhagavatula
- Division of Sleep Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
- Corporal Michael J. Crescenz Veterans Affairs Medical Center, Philadelphia, Pennsylvania
| | - Vishesh K. Kapur
- Division of Pulmonary Critical Care and Sleep Medicine, University of Washington, Seattle, Washington
| | - David Kuhlmann
- Sleep Medicine, Bothwell Regional Health Center, Sedalia, Missouri
| | - Jennifer Martin
- Geriatric Research, Education and Clinical Center, Veteran Affairs Greater Los Angeles Healthcare System, North Hills, California
- David Geffen School of Medicine at the University of California, Los Angeles, California
| | - Eric Olson
- Division of Pulmonary and Critical Care Medicine, Center for Sleep Medicine, Mayo Clinic, Rochester, Minnesota
| | - Susheel Patil
- Sleep Medicine Program, University Hospitals of Cleveland, Cleveland, Ohio
- Case Western Reserve University School of Medicine, Cleveland, Ohio
| | - James Rowley
- Rush University Medical Center, Chicago, Illinois
| | - Anita Shelgikar
- University of Michigan Sleep Disorders Center, University of Michigan, Ann Arbor, Michigan
| | - Lynn Marie Trotti
- Emory Sleep Center and Department of Neurology, Emory University School of Medicine, Atlanta, Georgia
| | - Emerson M. Wickwire
- Sleep Disorders Center, Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of Maryland School of Medicine, Baltimore, Maryland
- Department of Psychiatry, University of Maryland School of Medicine, Baltimore, Maryland
| | - Shannon S. Sullivan
- Division of Pulmonary, Asthma, and Sleep Medicine, Department of Pediatrics, Stanford University School of Medicine, Palo Alto, California
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Antle MC. The controversy over daylight saving time: evidence for and against. Curr Opin Pulm Med 2023; 29:574-579. [PMID: 37578383 DOI: 10.1097/mcp.0000000000001003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/15/2023]
Abstract
PURPOSE OF REVIEW Biannual clock changes to and from daylight saving time have been pervasive in many societies for over 50 years. Governments are considering abandoning this practice and choosing a single permanent time. RECENT FINDINGS Our endogenous circadian clock follows our photoperiod, which changes over the year. The acute disruption caused by changing our clocks can affect safety (motor vehicle and on the job accidents), health (cardiovascular disease, drug overdoses, suicide), and human behavior (sport performance, generosity, and procrastination). Although abandoning the clock change could help avoid these acute harms, choosing the wrong permanent time could lead to chronic circadian misalignment, which could have even more profound implications for health, safety, and human behavior. SUMMARY Ceasing the biannual clock change may be a good choice, but governments need to be mindful of which permanent time to adopt. Many regions of the world already follow the wrong time during standard time, and circadian misalignment would be amplified by moving to permanent daylight saving time. In many regions, Standard Time better aligns with our circadian clock, thus providing a more natural light cycle that minimizes circadian misalignment.
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Affiliation(s)
- Michael C Antle
- Department of Psychology
- Department of Physiology and Pharmacology, Cumming School of Medicine
- Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada
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