Cortex Cannibal · Brain & Behaviour · The Science of Being Human
Why Time Feels Faster as We Age
The neuroscience of memory, attention, and the years that seem to disappear.
When did a year stop feeling like a year?
Remember being a kid and waiting for summer? The last few weeks of school felt endless. Christmas took approximately seventeen years to arrive, and turning sixteen seemed like a distant milestone you might never actually reach. You had all the time in the world, and you couldn’t wait to get older.
Somewhere along the way, the years started getting away from us. One minute you’re twenty-something, falling in love, making questionable decisions, getting your heart broken, and imagining everything you’ll do with your life. Then you’re standing in the kitchen wondering how it’s nearly November when you’re reasonably certain you just put the Christmas decorations away.
And it isn’t just the calendar. It’s seeing a photograph of someone you love and realizing how much they’ve changed. It’s watching your children grow out of the little versions of themselves you thought you’d have more time with. It’s noticing your parents getting older, or reaching for the phone to tell someone something before remembering they’re no longer here. Sometimes it’s finding an old photograph of yourself and remembering exactly how it felt to be that person, even though the face looking back belongs to another lifetime.
How can something feel like yesterday when it happened twenty years ago? We accumulate more memories, more responsibilities, more people, and more stories, yet the years can feel increasingly difficult to hold on to. Neuroscience has some fascinating clues about why. The first is that the time we experience and the time we remember are not necessarily the same thing.
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Does time actually speed up?
Ask a room full of adults whether time seems to move faster than it did when they were children, and chances are you'll get a few knowing laughs. It's one of those experiences that feels almost universal, especially when people start talking about how quickly their children have grown or how another birthday has somehow arrived.
But feeling something strongly doesn't necessarily mean everyone experiences it in the same way. People differ in how they judge the passage of time, and even within one person's life, some periods seem to disappear while others feel almost endless. Age may be part of the picture, but it isn't a complete explanation.
This is where things get interesting, because our brains don't experience time in quite the straightforward way a clock measures it. A clock counts seconds whether we're bored, excited, grieving, or having the best day of our lives. Our subjective experience is far less consistent.
The two ways we experience time
Think about waiting in a doctor's office when you're already running late. You keep checking the clock, wondering how five minutes can possibly take so long. Now compare that with an evening spent laughing with people you love. You look up, and somehow three hours have disappeared. The clock has behaved perfectly normally in both situations. Your experience of those hours hasn't.
Researchers distinguish between judgments made while an interval is unfolding and judgments made afterward, when we look back and estimate how long something lasted. These are often described as prospective and retrospective timing. Attention and memory contribute differently depending on which kind of judgment we're making.
That distinction matters because the question of why time feels faster as we age often mixes the two together. We might be describing how quickly a particular afternoon passed, or we might be looking back on an entire decade and wondering where it went. Those aren't necessarily the same psychological experience.
The time we live through and the time we remember don't always feel the same.
Memory doesn't preserve every second of our lives as though someone has been recording continuously in the background. What we remember depends on many things, including what we noticed, what mattered to us, and how experiences became organized into events. That makes memory an important part of the story, although it doesn't give us a single, proven explanation for the apparent acceleration of years.
Childhood and the long summer
Childhood is full of firsts. The first time you ride a bike without someone holding the seat. The first sleepover. The first time you're allowed to walk somewhere by yourself. Even ordinary places can feel enormous when you're small and still figuring out how the world works.
It's tempting to say that all this novelty makes childhood feel longer, but the science is more complicated than that. New experiences can change what we pay attention to and what becomes memorable. Whether those changes make an entire year feel longer in retrospect is a separate question, and not one researchers have settled.
Still, there's something recognizable about the difference between a summer when you're eight and one when you're forty. As children, we may be waiting for something exciting to happen, paying close attention to the days ahead. As adults, we can find ourselves managing so many competing demands that entire weeks pass before we've had a chance to think about them.
Maybe that's part of why an old photograph can stop us in our tracks. For a moment, we're reminded not just of what happened, but of how much life seemed to stretch out in front of us when it did.
Memory's uneven calendar
Have you ever noticed how clearly you can remember certain periods of your life, while others seem to have blurred together? You might remember the smell of your first apartment, the music you listened to when you were seventeen, or the exact feeling of sitting in a car beside someone you were falling in love with. Yet you might struggle to remember what you did three weekends ago.
Autobiographical memory isn't a complete recording of our lives. It's a collection of personal experiences and knowledge, shaped by what we notice, what matters to us, and how we reconstruct the past. Researchers have found that adults often recall a disproportionate number of autobiographical memories from adolescence and early adulthood, a pattern known as the reminiscence bump. The precise timing and strength of that pattern can vary depending on how memories are measured and what people are asked to remember.
Think about how much happens during those years. We begin making decisions about who we want to be, form relationships that may change our lives, and experience all kinds of beginnings and endings. It's understandable that memories from those years can remain especially meaningful, although researchers continue to debate exactly why the reminiscence bump occurs.
The hippocampus and a wider network of brain regions contribute to remembering personal events. These systems help us retrieve details of experiences and place them within a larger sense of our own history. But memory is reconstructive, which means remembering an event isn't the same as replaying an untouched recording of what happened.
Sometimes the past feels close not because it happened recently, but because it still matters.
None of this proves that memorable experiences make entire years feel longer. What it does show is that the past isn't distributed evenly in memory. Some periods leave behind a remarkable amount of detail, while others are harder to reconstruct. That difference may influence how we think about the years we've lived, but it isn't the whole explanation for why time seems to accelerate.
Familiar days and vanishing weeks
Adult life has a remarkable ability to become repetitive without us necessarily noticing. We get up, make coffee, go to work, take care of the house, remember the appointments, buy groceries, make dinner, and do it all again. There may be a hundred small things happening in any given week, but when someone asks what we've been up to, the answer is often some variation of, "Oh, you know. Same old."
Familiar routines can make daily life easier to manage. We don't have to consciously relearn every task, and that's generally a useful feature of an adaptable brain. But routine also raises an interesting question about memory: when many days resemble one another, how easily can we distinguish them afterward?
Researchers studying event memory have examined how the brain organizes ongoing experience into meaningful segments. Changes in activity, setting, or context can help create boundaries between events, and those boundaries may influence what we remember later. This offers a way of thinking about why some experiences stand out more clearly than others.
A useful distinction
A day that passes quickly while you're busy isn't necessarily a day you'll remember as short. Likewise, an experience that feels slow while it's happening may leave behind surprisingly little detail. Our immediate sense of duration and our later memory of an experience are related, but they aren't identical.
It's tempting to conclude that routine is the reason adulthood disappears so quickly. But the available research doesn't justify treating that as a universal rule. The relationship between event memory and our impression of whole months or years is more complicated than a simple formula of "more novelty equals more time."
What we can say is that ordinary life contains fewer obvious chapter breaks than we sometimes expect. The days don't arrive with labels telling us which ones we'll eventually miss. Sometimes a perfectly unremarkable Tuesday becomes important only years later, when we realize it belonged to a version of our lives that no longer exists.
The moments that seem to last
Not every part of adulthood feels fast. Anyone who has waited for difficult medical news, sat beside someone in a hospital room, or watched the clock during an anxious night knows that time can still feel painfully slow.
Attention, emotional state, and the circumstances of an experience can influence how long an interval seems to last. But those influences don't always operate in the same direction, and the way we judge a moment while living through it may differ from how we remember it afterward.
This is one reason simple advice about slowing down time can feel inadequate. We're not dealing with a single internal clock that can be adjusted by taking more photographs or trying a new hobby. We're dealing with several interacting processes involved in attention, memory, emotion, and judgment.
And perhaps that's worth remembering when we talk about wanting more time. Sometimes what we're really asking for isn't a longer afternoon. It's a little more of the life happening inside it.
When the years become personal
There comes a point when time stops being something we measure only in birthdays and calendars. We start measuring it in people. In the children who suddenly don't need us to tie their shoes anymore. In the parents whose faces look a little different from the ones we remember. In friendships that have lasted decades, and in the empty spaces left by people who were supposed to be here longer.
It's a strange thing to remember someone so clearly as they were twenty years ago while standing beside the person they've become today. The memory hasn't necessarily disappeared, but the present keeps moving. Sometimes the difference is beautiful. Sometimes it's difficult to accept. Usually it's a little of both.
And then there are the people we've lost. Grief can make the passage of time feel especially strange. An anniversary arrives and somehow another year has passed without them, even though certain memories remain painfully immediate. You might remember a conversation, a laugh, or the ordinary sound of someone moving around the house with a clarity that makes the distance between then and now feel almost impossible.
None of this means grief follows a particular timetable, or that everyone experiences loss in the same way. It's simply part of the complicated relationship between remembering someone and continuing to live in a world that keeps changing.
Sometimes the hardest part isn't how much time has passed. It's how close the people and moments we've lost can still feel.
Perhaps this is why growing older can bring such an uncomfortable awareness of time. We begin to understand how quickly circumstances can change, how temporary certain chapters of life really are, and how little warning we sometimes get before an ordinary moment becomes something we wish we could revisit.
Can we make time feel longer?
This is usually the point where someone suggests taking up a new hobby, booking a holiday, or doing something different every day. And there's nothing wrong with any of those things. New experiences can be meaningful, memorable, and genuinely enjoyable. But it would be misleading to promise that they'll make the next ten years feel twice as long.
Our perception of time is influenced by several processes, and researchers haven't established a reliable method for making whole years feel slower. What we can do is pay attention to the distinction between trying to change the speed of time and wanting to feel more connected to the life we're living.
You don't need to turn every ordinary day into an adventure. Sometimes paying attention means noticing the conversation you're having instead of thinking about the next thing on your list. Sometimes it means taking the photograph, asking the question, or sitting a little longer with someone you love.
Those choices don't come with a scientifically guaranteed time-expansion effect. Their value may be much simpler: they give us opportunities to participate more fully in experiences that matter to us.
And there's something reassuring about that. We don't have to manufacture extraordinary memories or spend our lives trying to outsmart the calendar. We can allow ordinary life to be ordinary while remembering that it still deserves our attention.
The years we still have
Maybe one of the strangest parts of growing older is realizing that we once lived through days we would now give almost anything to experience again. Not necessarily the big celebrations or the extraordinary moments, but the ordinary ones. A familiar voice calling from another room. A child falling asleep against your shoulder. Someone laughing at the kitchen table. A perfectly unremarkable afternoon when everyone you loved was still exactly where you expected them to be.
We rarely recognize those moments for what they might become. We're usually busy living them, thinking about tomorrow, worrying about something that eventually won't matter, or wishing for a different season of life to arrive.
And yet, somewhere in the middle of all that ordinary living, we're building the memories that will eventually tell the story of who we were. The brain doesn't preserve everything, and our sense of time will never be perfectly consistent. But perhaps understanding a little more about how memory works can change the way we think about the years ahead.
We can't stop time from passing. We can't make childhood last longer or return to the people and places we've lost. What we can do is recognize that the present isn't just something we're moving through on the way to somewhere else. It's the part of life we're actually in.
We spend childhood wishing time would hurry up and adulthood wishing it would slow down. Somewhere between those two versions of ourselves, an entire life is happening.
Maybe the hardest part of growing older isn't that time moves faster. It's that we finally understand what a year can hold, how much can change, and how many ordinary afternoons can become memories without announcing themselves as anything special.
So perhaps the question isn't how to make the years stop disappearing. Perhaps it's how to keep noticing the life that's happening while they're here.
So, why does time feel faster as we age?
There isn't one scientifically established explanation for why entire years can seem to pass more quickly as we grow older. Our experience of time involves attention, memory, emotion, and the circumstances of our lives, and those influences don't always work in the same way.
What researchers can distinguish is the difference between experiencing time as it passes and remembering how long something lasted. The brain doesn't preserve every moment equally, and the memories we carry from different periods of life aren't distributed evenly.
That doesn't mean novelty is a scientifically proven way to make your years longer, or that routine automatically makes them disappear. Those explanations are more certain than the evidence allows.
But perhaps understanding the difference between living through time and remembering it gives us another way to appreciate the ordinary moments that eventually become our lives.
Frequently Asked Questions
Does time actually move faster as we age?
No. Clock time doesn't change with age. What can change is our subjective experience of time and how we remember different periods of our lives. Researchers are still investigating why some people experience the years as passing more quickly.
Why did childhood summers feel so long?
Childhood involves changing routines, new experiences, anticipation, and developing cognitive abilities. These factors may influence attention and memory, but there isn't a single established scientific explanation for why childhood summers often seem longer in retrospect.
Does having new experiences slow down time?
Novel experiences can affect attention and what we remember, but that doesn't establish that they reliably make whole months or years feel longer. The relationship between memory and perceived duration depends on the type of experience and how time is being judged.
What is the reminiscence bump?
The reminiscence bump is a pattern in autobiographical memory in which adults tend to recall disproportionately many memories from adolescence and early adulthood. Its timing and magnitude vary across studies, and researchers continue to investigate why it occurs.
Is the hippocampus responsible for our sense of time?
The hippocampus contributes to episodic and autobiographical memory, including aspects of how experiences are represented and remembered. But our perception of time involves multiple brain systems and processes. It would be inaccurate to describe the hippocampus as a single internal clock.
Can mindfulness make time feel slower?
Paying attention to the present can change how we engage with an experience, but there isn't sufficient evidence to promise that mindfulness will make entire years feel longer. Its potential benefits should be considered separately from claims about slowing the subjective passage of time.
References & Further Reading
This article draws on research into autobiographical memory, the organization of experiences into events, and how memory contributes to our understanding of the past. These findings offer useful context, but they do not establish a single explanation for why years seem to pass faster with age.
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Munawar K, Kuhn SK, Haque S.
Understanding the reminiscence bump:
A systematic review.
PLoS ONE.
2018;13(12):e0208595.
Read the open-access study -
Clewett D, DuBrow S, Davachi L.
Transcending time in the brain:
How event memories are constructed
from experience.
Hippocampus.
2019;29(3):162–183.
Read the open-access review
Scientific note: Research on autobiographical memory and event segmentation helps explain how experiences are encoded and recalled. It should not be interpreted as direct proof that novelty, routine, or aging causes whole years to feel shorter.