Sleep and circadian science
Understand sleep science—and put it to use.
Michael Grandner, PhD, is a sleep and circadian scientist, clinician, and educator. This site brings together his research, clinical perspective, teaching, and public communication to help people understand sleep in context and use the science thoughtfully.
A different way to think about sleep
Sleep is multidimensional, contextual, and connected to the rest of life.
Sleep is shaped by biology, behavior, timing, environment, social conditions, health, and life circumstances. Understanding it means looking beyond a single number, an isolated behavior, or a generic recommendation.
Michael’s work connects these dimensions without losing their complexity—so scientific evidence can become more useful in research, clinical care, education, and everyday decisions.
Find your way in
What brought you here?
Choose the path that best matches what you want to understand, explore, learn, or do.
Understand sleep
Explore clear explanations, books, resources, screening tools, and appropriate clinical-care information.
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Join the scientific discussion
Connect with the Seminar, research program, publications, and resources for scientific work.
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Training
Learn about workshops, graduate and postdoctoral study, fellowship pathways, and professional education.
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Work with Michael
Find speaking, organizational training, consulting, subject-matter expertise, and personal sleep consultation.
See ways to work together →Happening now
Upcoming opportunities to learn and connect.
The next public Seminar, workshop, and speaking engagement will appear here automatically when scheduled.
Next Seminar
The Multivariate Association between Exposome, Sleep Health, and Depression: A Computational Approach
Masoud TahmasianUniversity of Cologns, FRANCE
October 1, 2026
Event details →Next Workshop
Adapting and Modifying CBTI
September 24, 2027
Tucson, AZ
This advanced workshop examines when and how to adapt CBT-I (and when modification is not appropriate). Through focused instruction and case discussion, participants will consider assessment strategies, modifications to core treatment components, medication-related issues, lifespan and comorbidity considerations, referral decisions, and approaches to complex or incomplete treatment response.
Event details →Next Speaking Engagement
Nothing public is scheduled yet
Check the relevant section for future announcements.
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Meet Michael
Science, care, education, and public communication.
Michael Grandner is Professor of Psychiatry at the University of Arizona, Director of the Sleep & Health Research Program, and Director of the Behavioral Sleep Medicine Clinic. His work connects sleep and circadian science with health, clinical care, performance, and daily life through research, education, writing, public communication, and scientific advising.
Sleep and circadian scientist · clinician · educator
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