Researchers say daylight saving time may worsen cognitive, psychological problems

June 2, 2026 - 22:00

Daylight saving time may be more than just a minor disruption to sleep schedules. A growing body of research suggests that the biannual clock shift could worsen cognitive function and psychological well-being for millions of people. Scientists warn that the abrupt change in circadian rhythms can trigger or intensify problems such as memory lapses, difficulty concentrating, and mood disorders like depression and anxiety.

The transition to daylight saving time in spring, when clocks move forward one hour, is particularly concerning. Studies show that the loss of an hour of sleep can lead to a measurable decline in attention and decision-making abilities for days afterward. For individuals already struggling with mental health conditions, the disruption may amplify symptoms. Researchers point to a spike in hospital visits for mood disorders and even a slight increase in suicide rates during the weeks following the spring shift.

The fall transition, while often seen as a gain of an hour, is not without risks. The sudden change in light exposure can confuse the body's internal clock, leading to fatigue and irritability. Some experts argue that the cumulative effect of these twice-yearly adjustments may contribute to long-term cognitive decline, particularly in older adults. As debates over abolishing daylight saving time continue, scientists emphasize that the potential harm to brain health deserves serious consideration.