What do experts say about daylight saving time?

Experts describe daylight saving time (DST) as disruptive to sleep and circadian rhythms and favor eliminating the clock change.

• Dr. Samer Hattar and Andrew Huberman: They say the shift can push circadian timing later, compounding delays—especially for people who already struggle to fall asleep and wake up late. 1
• Mental health and abolition: Huberman characterizes DST as “anti-health,” citing increased car crashes, heart attacks, and depression; he and Hattar support abolishing the change. Hattar also refers to studies associating year-round DST with more problems, including depression. 2 3
• Natural light and consistency: They emphasize keeping routines aligned with the natural light–dark cycle; Hattar argues that a consistent clock allows the body to track seasonal daylight without the abrupt spring and fall shifts. 4 5