Why Time Feels Like It’s Speeding Up as You Get Older
The “time flew” cliché hides two different experiences—attention in the moment and memory in hindsight. Here’s what science suggests, and how to reshape the chapters.
By TheMurrow Editorial
February 7, 2026
Key Points
- 1Distinguish the two clocks: prospective time depends on attention; retrospective time depends on memory—and they often contradict each other.
- 2Increase event density: routine compresses years in hindsight, while contextual change and clear boundaries create richer, longer-feeling chapters.
- 3Design for distinctiveness: add novelty, projects with endings, and small rituals to lay down retrievable markers without manufacturing chaos.
A decade can vanish—until something brings it back
A decade can vanish without leaving much of a trace—until a song from 2014 comes on and suddenly you’re back in a car you no longer own, on a street that’s been redeveloped, with a life that felt permanent at the time.
Ask adults what happened to the years after college, after the first job, after the first move, and you’ll hear a familiar complaint: time accelerates. The sensation is so widespread it’s treated as a law of nature, like gravity or back pain. Yet the experience is more specific—and more interesting—than the cliché suggests.
Psychologists have long argued that “time speeding up” is not one thing. It’s at least two. One happens while you’re living your day. The other happens when you look back and try to reconstruct a month, a year, a decade from memory. Those two forms of time don’t always agree, and the gap between them may be where the feeling of acceleration is born.
Ask adults what happened to the years after college, after the first job, after the first move, and you’ll hear a familiar complaint: time accelerates. The sensation is so widespread it’s treated as a law of nature, like gravity or back pain. Yet the experience is more specific—and more interesting—than the cliché suggests.
Psychologists have long argued that “time speeding up” is not one thing. It’s at least two. One happens while you’re living your day. The other happens when you look back and try to reconstruct a month, a year, a decade from memory. Those two forms of time don’t always agree, and the gap between them may be where the feeling of acceleration is born.
“The feeling that time speeds up with age isn’t a single phenomenon. It’s a clash between attention in the moment and memory after the fact.”
— — TheMurrow Editorial
What “time speeds up” really means (and why the distinction matters)
People use the phrase “time flew” as if it describes a universal clock inside the skull. Research paints a more complicated picture by separating two related judgments.
Prospective time: how long something feels while it’s happening
Prospective time perception is the “is this meeting ever going to end?” experience. It depends heavily on attention and task demands. When attention is trapped on time—watching the clock, waiting for a page to load—seconds expand. When attention is absorbed by a task, time shrinks.
Classic experimental work shows that prospective timing and retrospective judgments can pull in opposite directions depending on what you attend to and how your attention is split. In plain language: the same hour can feel slow in the moment and fast afterward.
Classic experimental work shows that prospective timing and retrospective judgments can pull in opposite directions depending on what you attend to and how your attention is split. In plain language: the same hour can feel slow in the moment and fast afterward.
Retrospective time: how long a period feels in hindsight
Retrospective time perception—also called passage-of-time judgments—is what most people mean when they say aging makes time speed up. It’s the feeling that “the last ten years disappeared,” even if plenty of individual days inside those years felt long.
Popular summaries of the research point to a pattern worth taking seriously: age effects appear more consistently for long retrospective spans (years or decades) than for short spans (days or weeks), where results are less reliably linked to age. That difference matters because it suggests the “speeding up” problem may not be primarily about the internal stopwatch. It may be about how memory compresses experience when it becomes repetitive.
Real-world example: A parent might swear summer vacation felt endless as a child (retrospective), even though many afternoons were spent bored (prospective). Later, as an adult, a full year of school runs, errands, and work deadlines can feel like it evaporated—despite days that felt grueling at the time.
Popular summaries of the research point to a pattern worth taking seriously: age effects appear more consistently for long retrospective spans (years or decades) than for short spans (days or weeks), where results are less reliably linked to age. That difference matters because it suggests the “speeding up” problem may not be primarily about the internal stopwatch. It may be about how memory compresses experience when it becomes repetitive.
Real-world example: A parent might swear summer vacation felt endless as a child (retrospective), even though many afternoons were spent bored (prospective). Later, as an adult, a full year of school runs, errands, and work deadlines can feel like it evaporated—despite days that felt grueling at the time.
Key Insight
The same stretch of life can drag while you’re living it (prospective time) yet collapse later when you look back (retrospective time).
The ratio story: why one year changes meaning as you age
One explanation is so intuitive it’s repeated as common sense: a unit of time becomes a smaller fraction of your life as you get older. A year is huge when you’re five; it’s a rounding error when you’re fifty.
The numbers are clean enough to feel like proof. At age 5, a year is 20% of your lived experience. At age 50, a year is 2%. The same calendar interval occupies radically different psychological “real estate.”
The numbers are clean enough to feel like proof. At age 5, a year is 20% of your lived experience. At age 50, a year is 2%. The same calendar interval occupies radically different psychological “real estate.”
20%
At age 5, one year equals 20% of your lived experience—an enormous slice of life by comparison.
2%
At age 50, one year equals 2% of your lived experience—psychologically easier to treat as “just another year.”
Why the ratio explanation is persuasive—and incomplete
The proportionality argument works as a framing device. It helps explain why childhood feels sprawling and why later life can feel compressed. It also fits how people tell their stories: early milestones loom large because there aren’t many earlier chapters to compare them to.
Researchers and reviewers, though, tend to treat the ratio story as one factor among several, not a full mechanism. A conceptual ratio doesn’t specify what the brain is doing when it “shrinks” a year, or why certain years (a divorce, a move, a pandemic) refuse to be compressed.
A recent review on the topic (circulating in preprint form) treats proportionality as plausible but not sufficient: it doesn’t tell you how attention, memory, emotion, and routine reshape the felt passage of time.
Researchers and reviewers, though, tend to treat the ratio story as one factor among several, not a full mechanism. A conceptual ratio doesn’t specify what the brain is doing when it “shrinks” a year, or why certain years (a divorce, a move, a pandemic) refuse to be compressed.
A recent review on the topic (circulating in preprint form) treats proportionality as plausible but not sufficient: it doesn’t tell you how attention, memory, emotion, and routine reshape the felt passage of time.
“A year is the same length on a calendar. What changes is how much of your life your brain treats it as.”
— — TheMurrow Editorial
Practical implication: your calendar isn’t your experience
If “time speeding up” were only a ratio problem, then nothing would slow it—except being younger. Yet people routinely report that certain years feel longer in hindsight when they contain upheaval or novelty. That’s the first clue that memory, not mathematics, is doing much of the work.
Memory and “event density”: why routine makes years collapse
Retrospective time depends on what you can retrieve. A period stuffed with distinct memories tends to feel longer when you look back. A period with fewer memorable markers tends to feel shorter—even if you were busy.
Researchers often describe this as contextual change or event density. The basic idea: more changes in setting, people, goals, and emotional texture leave more “hooks” for memory. When your weeks resemble one another, the mind has less material to reconstruct, and the span compresses.
A broad review of timing and mindfulness research discusses how retrospective timing tracks the amount of contextual change available at recall. Routine doesn’t just make days blend together; it gives memory fewer reasons to separate them.
Researchers often describe this as contextual change or event density. The basic idea: more changes in setting, people, goals, and emotional texture leave more “hooks” for memory. When your weeks resemble one another, the mind has less material to reconstruct, and the span compresses.
A broad review of timing and mindfulness research discusses how retrospective timing tracks the amount of contextual change available at recall. Routine doesn’t just make days blend together; it gives memory fewer reasons to separate them.
Case study: the “busy blur” year
Consider a year dominated by repeated structure: commute, meetings, dinner, chores, sleep. Many adults describe those years as both exhausting and strangely absent—like they happened “off-camera.”
Now compare that to a year with a move, a new job, a new city, or a new relationship. Even if the second year felt chaotic in the moment, it often expands in hindsight. More scenes. More distinctive chapters. More retrievable details.
Now compare that to a year with a move, a new job, a new city, or a new relationship. Even if the second year felt chaotic in the moment, it often expands in hindsight. More scenes. More distinctive chapters. More retrievable details.
Practical takeaways that follow from the evidence
- ✓If you want time to feel fuller in hindsight, create distinct memory cues: new routes, new projects, new skills, new people.
- ✓If you want time to feel calmer in the moment, reduce clock-watching and increase absorption—prospective time shrinks when attention is engaged.
- ✓If your life feels fast, the problem might not be “not enough time.” It might be “not enough boundaries.”
How the brain slices experience: event segmentation in everyday life
The mind doesn’t record life as one continuous stream. It parcels experience into meaningful units: a conversation, a task, a trip to the store, a scene in a movie. Researchers call this framework Event Segmentation Theory (EST).
Under EST, people maintain an internal model of “what’s happening now” and “what happens next.” When predictions fail—when the scene changes, a goal shifts, a surprising action occurs—the brain marks an event boundary and updates the model.
A major review of this work notes that event boundaries aren’t just abstract ideas. They’re measured in experiments where participants press a button when they perceive one meaningful unit ending and another beginning during a film. Importantly, the same review links “more normative” (more widely shared) segmentation patterns with better memory.
Under EST, people maintain an internal model of “what’s happening now” and “what happens next.” When predictions fail—when the scene changes, a goal shifts, a surprising action occurs—the brain marks an event boundary and updates the model.
A major review of this work notes that event boundaries aren’t just abstract ideas. They’re measured in experiments where participants press a button when they perceive one meaningful unit ending and another beginning during a film. Importantly, the same review links “more normative” (more widely shared) segmentation patterns with better memory.
Why event boundaries shape retrospective time
Event boundaries are memory’s filing system. They separate one mental folder from the next. A day with clear boundaries—distinct tasks, settings, interactions—creates more separations and more potential retrieval points.
A day spent in one mode (same desk, same apps, same problems) can be experienced as busy but recorded as homogeneous. In hindsight, homogeneous blocks collapse.
Real-world example: Think about travel. Airports, foreign streets, new foods, and unfamiliar social cues create constant prediction errors—constant boundaries. Travel days can feel long afterward even when they felt rushed at the time. That’s event segmentation doing its quiet accounting.
A day spent in one mode (same desk, same apps, same problems) can be experienced as busy but recorded as homogeneous. In hindsight, homogeneous blocks collapse.
Real-world example: Think about travel. Airports, foreign streets, new foods, and unfamiliar social cues create constant prediction errors—constant boundaries. Travel days can feel long afterward even when they felt rushed at the time. That’s event segmentation doing its quiet accounting.
“Memory doesn’t measure time in hours. It measures it in boundaries.”
— — TheMurrow Editorial
The reminiscence bump: why youth feels packed with life
If you’ve ever noticed older relatives vividly describing high school or early adulthood, you’ve encountered one of the best-known patterns in autobiographical memory: the reminiscence bump. People disproportionately recall memories from adolescence and early adulthood compared to other life periods.
A large internet-based study of roughly 2,000 participants aged 11–70 found a reminiscence bump with peaks around 15–18 for men and 13–14 for women in that dataset. The specific peak ages aren’t the only takeaway. The larger point is structural: the memory system does not distribute vivid recall evenly across the lifespan.
A large internet-based study of roughly 2,000 participants aged 11–70 found a reminiscence bump with peaks around 15–18 for men and 13–14 for women in that dataset. The specific peak ages aren’t the only takeaway. The larger point is structural: the memory system does not distribute vivid recall evenly across the lifespan.
~2,000
A large internet-based study included roughly 2,000 participants aged 11–70, showing a strong reminiscence bump in adolescence/early adulthood.
Why the bump matters for the feeling of time
Those early years are dense with firsts: first independence, first relationships, first big identity claims. Novelty and emotion create durable memory traces, and durable memory traces make a period feel extensive when you look back.
Meanwhile, later decades can contain fewer “firsts,” fewer identity shifts, and fewer sharp boundaries—unless you deliberately introduce them. A life can be rich and meaningful without being novel, but novelty does help memory keep the chapters distinct.
Meanwhile, later decades can contain fewer “firsts,” fewer identity shifts, and fewer sharp boundaries—unless you deliberately introduce them. A life can be rich and meaningful without being novel, but novelty does help memory keep the chapters distinct.
A fair counterpoint
Not everyone’s youth is saturated with vivid memories, and not everyone’s middle age is repetitive. The bump is a population-level pattern, not a personal destiny. Still, it helps explain why many people feel their “early life” lasted longer: the archive is simply thicker.
Practical implication: If you want your current decade to feel less compressed later, treat it like it deserves to be remembered. Give it events with edges.
Practical implication: If you want your current decade to feel less compressed later, treat it like it deserves to be remembered. Give it events with edges.
A newer neuroscience clue: older brains may register fewer “neural events”
Behavioral theories about memory and segmentation are persuasive, but they raise a harder question: does the brain’s moment-to-moment processing of experience change with age in a way that could plausibly compress time?
A striking piece of evidence arrived in a 2025 paper in Communications Biology titled “Temporal dedifferentiation of neural states with age during naturalistic viewing.” Researchers analyzed data from the Cam-CAN cohort: 577 participants aged 18–88 watched an 8-minute Alfred Hitchcock clip while undergoing fMRI. The team used a method called Greedy State Boundary Search (GSBS) to identify transitions between relatively stable neural activity patterns—effectively, the brain’s “state changes” during a continuous experience.
A striking piece of evidence arrived in a 2025 paper in Communications Biology titled “Temporal dedifferentiation of neural states with age during naturalistic viewing.” Researchers analyzed data from the Cam-CAN cohort: 577 participants aged 18–88 watched an 8-minute Alfred Hitchcock clip while undergoing fMRI. The team used a method called Greedy State Boundary Search (GSBS) to identify transitions between relatively stable neural activity patterns—effectively, the brain’s “state changes” during a continuous experience.
577
Cam-CAN fMRI analysis: 577 participants aged 18–88 watched an 8-minute Hitchcock clip to track neural “state changes.”
What the researchers found
The paper reports that neural states become longer with increasing age—meaning older participants showed fewer transitions during the same clip—especially in visual regions and ventromedial prefrontal areas.
Science coverage translated the finding into an intuitive possibility: if the brain registers fewer distinct events in the same objective span, lived experience may later feel compressed, because fewer internal markers were laid down.
The nuance is as important as the headline. The paper also notes that, despite longer neural states with age, the alignment between neural states and perceived event boundaries showed no age effect in some regions. In other words: coarse event segmentation may remain stable even if the neural “texture” of experience becomes less differentiated.
Science coverage translated the finding into an intuitive possibility: if the brain registers fewer distinct events in the same objective span, lived experience may later feel compressed, because fewer internal markers were laid down.
The nuance is as important as the headline. The paper also notes that, despite longer neural states with age, the alignment between neural states and perceived event boundaries showed no age effect in some regions. In other words: coarse event segmentation may remain stable even if the neural “texture” of experience becomes less differentiated.
How to read this without overreaching
No single fMRI study can “solve” a subjective experience as messy as time. Still, the scale here—577 people across seven decades of life—matters. It suggests the acceleration feeling might not be only a story people tell themselves. It may be grounded, in part, in how the brain parcels continuous experience.
What you can do with this: designing time that doesn’t vanish
Readers usually want an answer that sounds like advice: “How do I slow time down?” The honest answer is that you can’t change the clock, and you can’t fully command subjective time. You can, however, shape the ingredients that retrospective time feeds on.
Build “event boundaries” on purpose
You’re not trying to stay busy. You’re trying to stay distinct.
- Rotate environments: work from a library one day a week, or take meetings on a walking route that changes.
- Create projects with clear phases and endings.
- Mark transitions with rituals: a weekly review, a monthly day trip, a seasonal challenge.
- Rotate environments: work from a library one day a week, or take meetings on a walking route that changes.
- Create projects with clear phases and endings.
- Mark transitions with rituals: a weekly review, a monthly day trip, a seasonal challenge.
Increase novelty without manufacturing chaos
Novelty doesn’t require upheaval. It requires difference.
- Learn a new skill with visible milestones (language units, songs on an instrument, training blocks).
- Meet new people through structured settings (clubs, volunteering, classes).
- Take “micro-trips”: unfamiliar neighborhoods, museums, day hikes.
- Learn a new skill with visible milestones (language units, songs on an instrument, training blocks).
- Meet new people through structured settings (clubs, volunteering, classes).
- Take “micro-trips”: unfamiliar neighborhoods, museums, day hikes.
Don’t confuse “slow in the moment” with “long in hindsight”
A stressful week can feel long prospectively but vanish retrospectively if it leaves few distinct memories besides stress. If you’re stuck in a repetitive grind, adding a small number of vivid anchors—a dinner with friends, a day off-grid, a new routine—can expand the memory record without adding more labor.
Real-world example: Many people remember early pandemic months as strangely amorphous if their days were repetitive indoors, despite high anxiety. Others remember the same period as long if it included major contextual change (moving, job disruption, caregiving). The difference is not virtue; it’s event structure.
Real-world example: Many people remember early pandemic months as strangely amorphous if their days were repetitive indoors, despite high anxiety. Others remember the same period as long if it included major contextual change (moving, job disruption, caregiving). The difference is not virtue; it’s event structure.
Editor’s Note
The goal isn’t frantic novelty; it’s distinctiveness: enough boundaries and contextual change for memory to keep your chapters separate.
The question behind the question: what the “speeding up” feeling is really telling you
The fear under the cliché is not really about time. It’s about life becoming less legible. When years blur, people worry they are not living deliberately, not noticing, not storing enough proof that the days mattered.
Research on prospective vs retrospective timing, memory density, event segmentation, the reminiscence bump, and age-linked changes in neural state transitions converges on a sobering message: subjective time is not a neutral readout. It’s a reconstruction.
That can sound bleak until you notice the upside. Reconstructions can be influenced. Not by forcing yourself to “cherish every moment” (a sentimental demand that usually backfires), but by designing a life with texture—days that differ, projects that progress, relationships that deepen, and environments that change often enough to leave footprints in memory.
A full life doesn’t require constant novelty. It requires enough distinct chapters that, when you look back, the story doesn’t read like one long paragraph.
Research on prospective vs retrospective timing, memory density, event segmentation, the reminiscence bump, and age-linked changes in neural state transitions converges on a sobering message: subjective time is not a neutral readout. It’s a reconstruction.
That can sound bleak until you notice the upside. Reconstructions can be influenced. Not by forcing yourself to “cherish every moment” (a sentimental demand that usually backfires), but by designing a life with texture—days that differ, projects that progress, relationships that deepen, and environments that change often enough to leave footprints in memory.
A full life doesn’t require constant novelty. It requires enough distinct chapters that, when you look back, the story doesn’t read like one long paragraph.
“A full life doesn’t require constant novelty. It requires enough distinct chapters that, when you look back, the story doesn’t read like one long paragraph.”
— — TheMurrow Editorial
T
About the Author
TheMurrow Editorial is a writer for TheMurrow covering explainers.
Frequently Asked Questions
Does time really speed up as you get older, or is it just a cliché?
Many people report the feeling, and research suggests age effects are more consistent for retrospective judgments over long spans (years/decades) than for short intervals (days/weeks). The strongest explanations focus on memory and event structure rather than a literal internal clock running faster. The cliché points to something real, but it’s not one simple mechanism.
Why do boring routines make whole years feel like they disappeared?
Retrospective time depends on memory cues. Periods with fewer contextual changes—same places, tasks, and social settings—produce fewer distinctive memory “hooks.” When you look back, the brain reconstructs less detail, so the span feels shorter. This idea aligns with research emphasizing contextual change and event density in retrospective time judgments.
What’s the difference between prospective and retrospective time?
Prospective time is how long something feels while it’s happening, strongly shaped by attention and task demands. Retrospective time is how long a period feels when you look back, shaped more by memory and reconstruction. A day can drag prospectively and still feel like it “flew by” retrospectively if it leaves few distinct memories.
Is the “a year is a smaller fraction of your life” explanation correct?
It’s a compelling framing: at 5, one year is 20% of life; at 50, it’s 2%. Many researchers treat it as a contributor to subjective acceleration, but not a complete mechanistic account. It doesn’t explain why some later-life periods still feel long in hindsight when they contain novelty, change, or emotional landmarks.
What is event segmentation, and why does it matter for time?
Event Segmentation Theory proposes that people parse continuous experience into discrete events, with event boundaries often triggered when predictions about “what happens next” fail. Boundaries help organize memory. More boundaries and contextual shifts typically provide more retrieval points later, which can make a period feel longer in hindsight.
Is there brain evidence that aging changes how we register events?
A 2025 Communications Biology study using fMRI data from 577 participants aged 18–88 found that neural states during an 8-minute film clip tended to be longer with age (fewer transitions), especially in visual and ventromedial prefrontal regions. The authors report nuance: in some regions, alignment between neural states and perceived event boundaries showed no age effect, suggesting some aspects of segmentation may remain stable.
