Have you ever felt that days, weeks, months, and years seem to pass faster as you grow older?
Scientists say time itself does not speed up, but our perception of time can change with age.
Researchers have suggested several possible explanations for this feeling. A 2019 study published by Cambridge University Press examined the difference between clock time and the way people mentally experience the passage of time.
How Does the Brain Perceive Time?
According to researchers, clock time moves at the same rate, but the human brain can perceive it differently depending on experiences, memories, attention, and emotional state.
One explanation is known as the proportional theory. For example, at the age of 10, one year represents about 10 percent of a child’s life. At the age of 50, however, one year represents only about two percent of a person’s life.
Under this theory, each additional year may therefore feel relatively shorter compared with a person’s total life experience.
The Role of Routine
Another possible reason is that people generally experience more new things during childhood. New places, activities, people and experiences create distinctive memories, giving different periods of life a stronger sense of length.
As people grow older, daily routines may become more repetitive. When days and weeks follow similar patterns, fewer distinctive memories may be formed. Looking back, such periods can then seem to have passed quickly.
Attention also plays a role. During familiar activities, the brain can perform many tasks almost automatically. Instead of monitoring the passage of time, attention remains focused on the activity itself, making time seem to pass more quickly.
Emotions and Memories Matter
Emotional experiences may also influence our sense of time. Moments involving excitement, fear, happiness, surprise or other strong emotions often create vivid memories.
By contrast, periods dominated by boredom, tiredness, stress, or repetitive routines may leave fewer distinct memories. As a result, an extended period can appear shorter when viewed in retrospect.
Could Dopamine Be Involved?
Another possible factor is dopamine, a chemical messenger in the brain associated with motivation, reward and several other brain functions. It is also thought to be involved in the perception of time.
Changes in dopamine levels and brain processes that occur with age may therefore contribute to changes in how people experience the passage of time.
Can We Make Time Feel More Meaningful?
Although time itself cannot be slowed down, researchers suggest that introducing new experiences and activities into daily life may create more distinctive memories.
Mechanical engineering professor Adrian Bejan, who has written about the subject, has suggested that trying new things, seeking surprising experiences, exploring new ideas, and engaging in creative activities can make our experience of time feel richer.
In simple terms, the feeling that time speeds up with age may not be about the clock at all. It may be linked to how the brain processes new experiences, memories, attention, and emotions—and how those experiences are remembered later.