Daylight saving time (DST) requires people in many countries to adjust their clocks twice each year. While the time change is intended to make better use of daylight, it can affect sleep patterns and overall well-being.

The spring transition is often associated with losing an hour of sleep, which can temporarily disrupt daily routines. However, the fall shift back to standard time may also influence mental health by changing the timing of daylight and altering sleep schedules.

Although daylight saving time does not directly cause mental health conditions, research suggests it may worsen symptoms for individuals who already experience anxiety, depression, or other mood-related disorders.

Understanding how these seasonal time changes affect the body may help people prepare for and manage potential emotional and psychological effects.

Daylight Saving Time And Depression

Some studies have found a connection between daylight saving time transitions and changes in mood.

Research has linked time changes to sleep disturbances, mood fluctuations, and, in some cases, increased mental health challenges. For example, studies have shown that hospital visits related to depression may increase following the transition from daylight saving time back to standard time.

One possible explanation is the earlier sunset that occurs after the fall time change. Reduced daylight exposure during the afternoon and evening may contribute to lower mood levels.

For individuals who are already vulnerable to anxiety or depression, the shift in time may trigger worsening symptoms or emotional distress.

Seasonal affective disorder (SAD), a type of depression related to seasonal changes, may also become more noticeable when daylight hours decrease.

Why Changing The Clock Affects Mental Health

Although researchers continue to study the connection between daylight saving time and mental health, several possible explanations have been proposed.

Disruption Of Sleep Schedules

Changing the clock disrupts the body’s circadian rhythm, which controls many biological processes that follow a roughly 24-hour cycle.

Circadian rhythm changes
The circadian rhythm regulates important functions such as sleep, hormone production, and body temperature.

Sleep-wake cycle disruption
Even a one-hour change in sleep timing can interfere with the body’s natural sleep-wake cycle, which may affect mood and increase feelings of stress or anxiety.

Although the spring shift forward is often considered more disruptive to sleep, any change in sleep patterns can influence mental health.

Reduced Exposure To Sunlight

When clocks move back to standard time in the fall, sunsets occur earlier in the evening.

For people with traditional work schedules, this means daylight may disappear before they finish their day.

Less afternoon sunlight
Reduced daylight exposure can affect mood because sunlight plays an important role in regulating brain chemicals involved in emotional well-being.

Reduced outdoor activity
Earlier sunsets may also reduce the amount of time people spend outside, which can limit exposure to natural light and physical activity.

Spending time outdoors has been associated with positive effects on brain health and emotional balance. In contrast, decreased outdoor activity and increased sedentary behavior may contribute to mood changes.

Ways To Support Your Mood During Time Changes

Although time changes can affect mental health, several strategies may help reduce their impact.

Spend More Time Outside In The Morning

Morning sunlight can help reset the body’s internal clock and support healthy circadian rhythms.

Taking a walk outdoors shortly after waking up may help increase light exposure and improve mood.

Exposure to morning light may also reduce symptoms associated with seasonal affective disorder.

Try Light Therapy

For individuals who have limited access to natural sunlight, light therapy may be helpful.

Light therapy devices emit bright light that mimics natural daylight. Using a light box in the morning may help regulate circadian rhythms and improve mood.

Light therapy is commonly used to manage symptoms of seasonal affective disorder.

Stay Physically Active

Regular physical activity can support both mental and physical health.

Exercise has been shown to improve mood and reduce symptoms of anxiety and depression.

Health experts often recommend at least 150 minutes of moderate physical activity per week, along with muscle-strengthening exercises on two days.

Activities such as brisk walking, cycling, swimming, or strength training can help maintain emotional balance and improve energy levels.

Maintain Healthy Sleep Habits

Maintaining a consistent sleep schedule may help reduce the impact of time changes.

Going to bed and waking up at regular times can help stabilize circadian rhythms and improve sleep quality.

During the fall transition, some people may find it helpful to keep their usual bedtime while adjusting the amount of light entering the room in the morning.

When To Seek Professional Help

If time changes significantly affect your mood, sleep, or daily functioning, speaking with a healthcare professional may be beneficial.

Persistent symptoms such as low mood, anxiety, or fatigue may indicate a mental health condition that requires additional support.

Healthcare providers can evaluate symptoms and recommend appropriate treatments or coping strategies.

Practicing self-compassion during seasonal transitions is also important. Adjusting to time changes can take time, and prioritizing self-care may help ease the transition.