There is an appealing explanation for why childhood summers felt enormous while recent years seem to vanish. Young life is packed with firsts, the story goes, while adult routine gives memory fewer landmarks. Add novelty and the mind starts recording detail again, stretching time back out.
It is a beautiful idea. It may even contain part of the truth. But “novelty resets the clock” has traveled further than the evidence.
A major review published in late 2025 found that the science of life feeling fast is still fragmented, and that evidence for the routine-and-novelty account is mixed. There is no proven intervention that makes the years subjectively slow down.
This is an account of time-perception research, not psychological or medical advice. The first challenge is understanding that “time feels fast” can describe several different experiences.
Imagine waiting through a dull meeting. Each minute can drag while you are in it. Months later, the meeting may occupy almost no space in memory. A holiday can produce the opposite combination: the days rush past, but the trip feels long and eventful when recalled.
Researchers distinguish between judging duration and judging the passage of time. They also separate prospective timing, when a person is paying attention to time as it unfolds, from retrospective timing, when the person estimates an interval after it has ended.
Those are not academic niceties. In a 2016 experience-sampling study, Sylvie Droit-Volet and colleagues repeatedly questioned younger and older adults in everyday life. They found no age difference in how quickly time seemed to be passing in the moment. Passage-of-time judgments were also not significantly related to the participants’ estimates of duration.
Attention and emotion mattered more for the felt pace of the current activity. When attention is absorbed, people may stop monitoring time and report that it flew. When attention is fixed on the clock, an interval may feel slow.
The broad belief that time accelerates with age is not imaginary, but its size is easy to exaggerate.
Marc Wittmann and Sandra Lehnhoff surveyed 499 people between 14 and 94 years old. Their 2005 study in Psychological Reports generally supported an age-related quickening in momentary and retrospective judgments. Yet age accounted for no more than 10 percent of the variation, and the authors warned that their questionnaire-based findings needed cautious interpretation.
A different task produced a clearer age gap over two minutes. In a 2016 study of 233 people, participants closed their eyes and mentally judged when 120 seconds had elapsed. The group aged 50 to 89 stopped after an average of 86.6 seconds, compared with 114.9 seconds among those aged 15 to 29.
That experiment shows an age difference in estimating a short interval without a clock. It does not explain why an entire decade can feel compressed in memory. Moving from two minutes to ten years requires a theory about autobiographical experience, not just an internal stopwatch.
The most familiar theory is sometimes called routine compression. Novel, surprising, or demanding events are thought to leave distinctive memories. Repeated experiences are more likely to be bundled into broad categories such as commuting, working, or doing errands. Looking backward, a year with many retrievable landmarks may feel fuller and therefore longer.
ScienceBlog described this account in a 2017 article about age and “mind time”. It also fits the everyday intuition that a first week in a new city creates more memories than the hundredth week at home.
The new evidence review complicates that tidy story. In The Time of Your Life, published in Frontiers in Psychology, psychologists Mark Landau and Kevin Ryu mapped the proposed mechanisms behind judgments of life’s tempo.
Some field studies found that routine periods were remembered as passing faster. Other studies found no relationship between self-reported routine and the felt pace of recent years. Direct measures of the number of remembered events have produced negligible, mixed, or even opposite associations.
The review’s conclusion is blunt: empirical support for routine compression remains surprisingly thin. Long-term experiments are hard to run, self-reports are coarse, and the idea that more memories make a period feel slower has not held consistently across methods.
Even if novelty enriches memory, it need not make time feel slow while the experience unfolds. A fascinating new activity can capture attention so completely that an afternoon seems to disappear. In hindsight, the same afternoon may feel substantial because it contains many distinct details.
Meaningful periods can also feel as if they passed too quickly. That may reflect longing rather than a shortage of memory. People can remember a chapter vividly and still experience it as fleeting precisely because they valued it.
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Daily experience is similarly complicated. A 2023 study that prompted 105 people five times a day found that alertness, expected duration, emotional valence, and arousal predicted short-term passage judgments in different combinations. The most recent experience also weighed heavily on how participants judged the day as a whole.
There is no single dial labeled subjective time. Attention, memory, emotion, expectations, physiology, and the scale of the interval can point in different directions.
None of this makes novelty worthless. Trying something unfamiliar can produce learning, pleasure, challenge, and more distinctive memories. Those are good reasons to value it. They are not evidence that novelty reliably resets an aging clock.
The 2025 review explicitly cautions that popular prescriptions such as novelty, enjoyment, and mindfulness do not always move remembered time in the predicted direction. Periods marked by engagement, mastery, and growth may be remembered as fast, and fast need not mean empty or badly lived.
The fairest answer to why time speeds up with age is therefore unsatisfying but honest. For many people it does, although age explains only a modest share of the difference. Routine and memory may contribute, but so can attention, emotion, cultural expectations, and how the question is asked.
Novelty does not reset the clock. It can give the clock more memorable things to pass.