A Tuesday can drag while the year containing it seems to disappear. That familiar contrast makes “time flies as you get older” feel like an obvious law. The research is less tidy: the answer depends on which stretch of time people are judging, how they are asked and what else is happening in their lives.
Does everyone experience the same acceleration?
In a 2005 study of 499 people aged 14 to 94, Marc Wittmann and Sandra Lehnhoff found age-related differences in judgments of time. However, the effects were small to moderate, accounting for at most 10% of variation on the measures used. Age was not a complete explanation.
A 2010 study by William Friedman and Steve Janssen included 1,865 adults aged 16 to 80 in two countries. People across ages reported time passing quickly. Age differences were generally very small, apart from judgments about the preceding ten years. The findings supported a role for perceived time pressure.
That is a reason to ask a more precise question. Are we talking about waiting through a meeting, remembering last month or comparing entire decades? These are related experiences, but they should not be treated as interchangeable measurements.
Why the simple explanations are tempting
The proportional idea says that a year represents a smaller fraction of your life as you age. Its arithmetic is clear: one year is one-tenth of ten years and one-fiftieth of fifty. The calculation alone does not demonstrate that a brain uses those fractions to judge duration.
Memory-based explanations suggest that distinctive events provide landmarks when looking back. In their research, Friedman and Janssen considered theories involving memorable events, recall and time pressure. The existence of a plausible explanation should not be confused with evidence that it accounts for everyone’s experience.
Another proposal, Adrian Bejan’s 2019 account, connects perceived time with changes in the rate of processing mental images. It is a theoretical explanation. Describing childhood as a brain running at a higher “frame rate” is not a direct measurement of how long childhood feels.
What you can try without promising to slow the clock
Our practical suggestion is to make room for experiences you actually value and keep a modest record if you enjoy doing so. A few notes, photographs or dates can give you something concrete to revisit. You might also notice which commitments create the feeling of being continually rushed.
These are ideas for reflection, not a proven protocol for stretching a year. A new hobby is allowed to be enjoyable without earning extra subjective months. Routine can also be comforting and useful; it does not mean you are wasting your life.
We would not explain the feeling through a guaranteed dopamine “reset.” That language overstates what a change in habits can show, as discussed in our guide to dopamine fasting.
Leave room for different experiences
The person beside you may describe the same year differently. That need not make either account wrong. Perceived time is an experience to investigate, not a competition to see who lived most attentively.
And the cat in the sunbeam? A useful image for a quiet afternoon, certainly. Evidence that cats never worry about time, or that they have solved human ageing, it is not.
Editorial review: 10 September 2026. Added empirical studies, distinguished theories from established results and removed claims of universal age effects and guaranteed time-slowing techniques.
