Why Do the Years Feel Shorter as You Age? The Psychology of Time
At ten years old, the summer holidays felt endless — six weeks that stretched like a lifetime. At forty, entire years seem to evaporate between Christmases. “Where did the year go?” is the defining lament of adult life, and it is not just nostalgia talking: psychologists have studied this phenomenon for over a century, and the feeling that time accelerates with age is one of the most robust findings in the psychology of time perception. The good news is that understanding why it happens reveals how to slow it back down.
The proportional theory: simple maths, real effect
The oldest explanation, proposed by philosopher Paul Janet in 1877, is disarmingly simple: we judge durations relative to our total lived experience. To a ten-year-old, one year is a tenth of their entire life — an enormous fraction. To a fifty-year-old, it is one-fiftieth — a sliver. Each passing year is proportionally smaller, so it feels shorter. This “proportional theory” is intuitive and almost certainly part of the story, though modern research suggests it is not the whole story — because the effect persists even when researchers control for proportional framing.
Memory is the real clock: novelty versus routine
The deeper explanation concerns how the brain measures time retrospectively. We do not have a mental stopwatch; we reconstruct durations from memory. And memory is laid down in proportion to novelty. A year packed with firsts — new places, new people, new experiences — creates dense, rich memories, and looking back it feels long. A year of routine — same commute, same desk, same evenings — creates few distinct memories, and looking back it seems to have vanished.
This is why childhood summers felt endless (everything was new) and why the pandemic years felt simultaneously endless in the moment and compressed in retrospect (monotonous days, few landmarks). Neuroscientists describe it as the difference between prospective time (how long something feels while happening, driven by attention) and retrospective time (how long it feels looking back, driven by memory density). Routine makes time fly prospectively through inattention and shrink retrospectively through thin memories — a double compression.
Routine also explains the role of attention. When you are engaged and attentive, time feels fuller; when you are on autopilot — scrolling, commuting, half-watching — the brain barely registers the hours. Modern life, with its hours of screen time dissolving into undifferentiated scrolling, is practically engineered to compress retrospective time. The days do not just feel short; they leave almost no trace.
The biology: dopamine and the internal pacemaker
There is a neurochemical layer too. Dopamine — central to novelty, reward, and motivation — modulates our internal sense of time’s passage. Novel experiences trigger dopamine release, which both heightens attention in the moment and strengthens memory encoding afterwards. Ageing is associated with gradual changes in dopaminergic function, potentially dulling both the novelty response and time perception. None of this is destiny — it is mechanism, and mechanisms can be worked with.
How to slow time back down
The research points to a clear prescription: maximise novelty and attention. Break routines deliberately. Take a different route, try the unfamiliar restaurant, learn something that makes you a beginner again — beginnerhood is time-dilating because everything is new. Travel, even locally. New environments force attention and create dense memories; a weekend in an unfamiliar city lays down more memory than a month of routine. Practise attention. Mindfulness, journaling, and photography all work by the same mechanism: they force the brain to notice and encode, thickening the memory record that retrospective time is built from.
Mark time with firsts. Aim for a regular cadence of novel experiences — monthly, not yearly. The people who report the longest-feeling years are not necessarily the busiest but the most varied. And protect sleep: memory consolidation happens during deep sleep, so the experiences you do have need proper rest to be encoded — our guide to improving your sleep without medication covers the foundations.
The BBC‘s science coverage has explored time-perception research extensively, and the NHS‘s Every Mind Matters resources touch on how routine, attention, and mental health interact — relevant because depression and anxiety also distort time perception significantly.
The bottom line
The years feel shorter as you age because each year is a smaller fraction of your life, because routine lays down thin memories that retrospect collapses, and because inattention lets hours pass unregistered. The fix is not to fight ageing but to fight routine: novelty, attention, firsts, and experiences worth remembering. Time does not actually accelerate — but a life dense with new memories genuinely feels longer, both while living it and looking back.
Time perception in children versus adults
The contrast between childhood and adult time perception is stark, and it illuminates the mechanisms. Children’s days are dense with novelty — new skills, new social dynamics, new environments — so their retrospective time runs long: ask an adult about age eight and the year feels enormous in memory. But children’s prospective time runs slow too: waiting a week for a birthday feels endless, because their internal pacemaker ticks faster and they have fewer temporal landmarks to segment the wait.
Adults invert both: prospective time flies (the weeks blur because attention is thin and routine is thick) while retrospective time compresses (few distinct memories to anchor the year). This double inversion is why midlife often brings the shock of “the years are speeding up” — it’s not that time changed, but that the novelty-to-routine ratio flipped. The practical lesson cuts both ways: give children structured novelty and their waiting feels shorter; give yourself structured novelty and your years feel longer. In both cases, the intervention is the same — break the routine, pay attention, make memories worth encoding.
Frequently Asked Questions
Why does time go faster as you get older?
Three converging reasons: each year is proportionally smaller relative to your total life, adult routine creates fewer distinct memories (and we judge past durations by memory density), and inattention during habitual activities means hours pass unregistered.
Is it true that novel experiences slow down time perception?
Yes — this is well-supported. Novel experiences trigger dopamine, heighten attention, and create denser memories, making periods feel longer both while happening and in retrospect. It is why holidays feel longer than ordinary weeks.
Can you actually make time feel slower?
You cannot change clock time, but you can change perceived time: break routines, seek novelty, practise attention through mindfulness or journaling, travel, and learn new skills. People with varied, attentive lives consistently report time feeling richer and longer.
Does screen time make time feel faster?
Evidence suggests heavy passive screen time compresses retrospective time — hours of scrolling create few distinct memories, so the time seems to vanish looking back. Active, engaged screen use (creating, learning) does not have the same effect.
Do children really experience time more slowly?
Retrospectively, yes — childhood periods feel longer looking back because nearly everything was novel and memory-dense. In the moment, children are often impatient precisely because their prospective time perception runs slower too: waiting feels endless.
Does feeling that time speeds up affect mental health?
It can — the sensation that life is accelerating is linked to anxiety and the feeling of time scarcity, particularly in midlife. The same interventions that stretch perceived time (novelty, attention, presence) also reduce that anxiety, because they address its root: the sense of life passing unregistered. If the feeling is distressing rather than wistful, it is worth discussing with a professional.