Do you remember when summer holidays seemed endless and a school year felt like forever? In adulthood, many people experience the opposite: months seem to fly by, and another year has passed before they realize it. Psychologists have studied this feeling, but there is no single, definitive explanation.
Why does a year seem shorter as we get older?
One intuitive explanation is that each year represents a smaller proportion of our lives as we accumulate experiences. For a 10-year-old, one year equals 10% of their life; for a 50-year-old, it is about 2%. This comparison may help explain the intuition, but it does not show that the brain measures time as a percentage of life. Perception depends on attention, memory, context, and the period being judged. Estimating a few seconds as they pass is not the same as remembering how long a decade seemed.
Routine and new experiences
Childhood and adolescence often involve many changes: learning skills, meeting people, changing schools, and discovering new places. In adulthood, some activities become more predictable. One hypothesis suggests that periods with fewer distinct events may seem shorter when remembered. However, evidence does not establish routine as the main cause of this feeling. New experiences can enrich life, but they are not a proven technique for slowing time down.
Memory shapes how we remember time
Memory does not record every second with equal detail. When recalling a week, month, or several years, we reconstruct a mental representation from events we can retrieve. Friedman and Janssen (2010) found that age differences were particularly apparent when people judged the previous decade, although findings were not uniform across all periods. A 2026 study in Memory & Cognition found that lower ability to encode new information was associated with the feeling that the past decade had passed more quickly; the amount or subjective value of autobiographical memories was not significantly associated. These findings suggest that the relationship between memory and time perception is complex.
Attention and emotions matter too
When waiting for important news or feeling bored, we may focus on each minute and experience the wait as long. When absorbed in an interesting activity, we may be surprised by how much time has passed. A review by Block and Gruber (2014) examined time perception, attention, and memory, noting that estimates depend, among other things, on whether we judge time as it passes or afterward. Stress, concentration, and expectations may also influence the experience, depending on context.
Does brain aging play a role?
Aging brings changes in several cognitive functions, but their extent varies among individuals. Attention, working memory, and other functions contribute to some timing tasks. However, estimating a few seconds in an experiment is not the same as retrospectively judging how long a decade lasted. No single biological mechanism has been shown to make time progressively speed up for every older adult. This feeling alone is not a sign of cognitive decline.
How to enrich your weeks
Although we cannot control the speed of the clock, we can make changes that help us pay attention to our experiences and preserve meaningful memories.
- Learn something new. Spend time learning a language, playing an instrument, or developing a skill.
- Break a few routines. Explore a nearby place or try an activity you usually put off.
- Spend quality time together. An uninterrupted conversation or a family activity can become a meaningful memory.
- Record important moments. Write a few lines about something you learned or enjoyed. This has not been proven to make time feel slower.
- Make room for rest. Sleep, leisure, and quiet moments are also part of a balanced life.
Visualize the time you are living
When years seem to pass quickly, it may help to look at life from another perspective. Your Life in Weeks lets you visualize elapsed time and reflect on how you distribute your weeks among work, rest, family, learning, and personal projects. The tool does not predict how long anyone will live or determine how much time remains; it is a visual aid for reflecting on time and priorities.
You might ask yourself: What activity would I like to return to? Which relationship deserves more attention? What skill would I like to learn in the coming months? You do not need to transform your life all at once. Sometimes choosing one activity and giving it an hour each week is enough to begin.
We may not be able to control the speed of time, but we can pay closer attention to the life unfolding as it passes.
Scientific references
- Wittmann M, Lehnhoff S. Age effects in perception of time. Psychological Reports. 2005;97(3):921–935. https://doi.org/10.2466/pr0.97.3.921-935
- Friedman WJ, Janssen SMJ. Aging and the speed of time. Acta Psychologica. 2010;134(2):130–141. https://doi.org/10.1016/j.actpsy.2010.01.004
- Block RA, Gruber RP. Time perception, attention, and memory: A selective review. Acta Psychologica. 2014;149:129–133. https://doi.org/10.1016/j.actpsy.2013.11.003
- Teghil A, Wittmann S, Lifrieri A, et al. Memory encoding for new information, not autobiographical memory load, is linked with age-related differences in subjective time passage over the past decade. Memory & Cognition. Published April 7, 2026. https://doi.org/10.3758/s13421-026-01879-1
Make your time visible
Explore your weeks and reflect on the activities that matter to you.
Explore my life in weeksA tool for reflection, not prediction.