You’ve been around for six or seven decades, but lately the years seem to be moving at record speed.
Christmas was just here. Somehow it’s already summer again. You look back at the last five years, and they feel much shorter than five years felt when you were 25.
The calendar gave you the same 365 days every year. What changed is how many of them your memory filed separately, and in later life, that number tends to drop.
Living through a year and remembering it are two different experiences
There are two ways your brain keeps track of time.
One is happening right now, in the moment: the Tuesday afternoon that feels like it’s dragging, or the vacation day that seems to vanish. That’s your brain’s real-time clock, and it responds to what you’re doing and how you feel about it.
The other clock is retrospective. It’s the one you use when you try to figure out where the last year went. That clock works differently. It doesn’t measure hours. It counts markers: how many distinct, separate events your memory stored from that period.
A team led by Marc Wittmann at the Institute for Frontier Areas of Psychology in Freiburg, Germany, tested this with 120 adults ranging from age 20 to 91.
They wanted to know whether the people who felt the decade had flown by also remembered less of it. So they asked everyone to recall meaningful events from the past ten years, and also tested how well their brains were taking in new information in the moment.
The number of meaningful memories didn’t matter. People in their seventies and eighties recalled the big events of the last decade just as well as people in their twenties, and described those memories as more vivid and more personally important. They weren’t losing the highlights. If anything, they were holding them more closely.
What did predict the feeling of time speeding up was how well someone’s brain was catching the small stuff. Not the wedding or the grandchild’s birth, but the ordinary Wednesday, the conversation at the post office, the walk that was slightly different from the walk the day before.
When the brain stops tagging those everyday moments as separate from each other, the decade feels thinner in hindsight.
Your twenties had more firsts, and that’s most of the difference
Think about what your twenties contained.
Leaving home. The first real job. Maybe a marriage or a first apartment or a cross-country move. The first time you had to figure out your taxes, or cook dinner for someone you were trying to impress, or sit in a meeting where people expected you to know something.
Each of those was a new kind of experience, and new experiences get encoded in rich detail. Your brain files them with more information because it has no existing template to work from.
The result is that your twenties feel enormous in memory. There are simply more separate events for your brain to count.
Now compare that to a settled stretch of later life.
You’ve been in the same house for fifteen years. Your weeks follow a rhythm you didn’t plan but can’t quite seem to change. The grocery store, the doctor, the same walk, the same chair, the same news at the same time of day.
None of that is wrong. Routine can be comfortable, and comfort is not a failure. But routine gives memory less to separate one week from the next.
During COVID lockdowns, a small study gave 18 older adults a smartphone app that helped them capture both routine and unique events.
When they reviewed the recordings later, the unique events were recalled in much greater detail than the routine ones. The routine days blurred together. The days that contained something different stayed sharp.
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New experiences don’t slow the clock, but they give memory more to hold onto
Psychologist Claudia Hammond has written about what she calls the holiday paradox: a vacation feels like it flies by while you’re in it, but in retrospect it seems to have lasted longer than the same number of days at home.
The reason is that the vacation created more distinct memories, and in retrospect, the period feels more substantial for it.
The same principle works outside of vacations. A new class, an unfamiliar neighborhood to walk in, a volunteering role, a weekly afternoon with a grandchild where you’re learning something together.
These don’t slow time in the moment. But they give your brain more places to put a pin, which means the month that contains them will feel longer and more textured in hindsight.
That doesn’t mean you need to overhaul your life or fill every week with something unfamiliar. It means that when a period does contain something new, your brain is more likely to keep it as its own separate event rather than folding it into the blur of everything else.
Even one distinct day can change the shape of a whole month.
Some of the fastest years are the ones you’d want back
Before this turns into a simple formula of “routine compresses time, novelty stretches it,” there’s a wrinkle worth knowing about.
Mark Landau, a psychologist at the University of Kansas, led a 2026 review of what he calls life-tempo judgments: how fast or slow a meaningful period of your life felt in retrospect.
What his review found is that the periods people remember as most meaningful, most engaging, most full of personal growth are often the very same periods they say flew by the fastest.
That means “where did the year go” can mean two almost opposite things. It can mean the year was empty, with too few markers to fill it out. Or it can mean the year was so full that you were absorbed in living it, and it felt fast for the best possible reason.
The decade you spent raising young children might feel like it went by in a flash, not because nothing was happening, but because you were too deep in it to stand back and watch the time pass. That’s a very different kind of fast from the years that blurred together because nothing changed.
Feeling the years speed up is not, by itself, a sign that something is wrong
Nearly everyone over 50 reports some version of this feeling, and that alone should be reassuring. Wittmann’s surveys have replicated across countries for two decades: Germany, Austria, the Netherlands, New Zealand, Canada, Japan. The pattern is consistent, and it’s normal.
That said, there’s a difference between the common experience of years feeling shorter and significant new difficulties with memory.
If you’re struggling to recall recent conversations, losing track of things you’ve been told more than once, or noticing changes that worry the people around you, that’s a different question and one worth raising with a doctor.
Researchers don’t have one clean answer for why time feels faster as you age. The routine-and-memory explanation is a real part of it, but so are attention, emotion, and things science hasn’t fully worked out yet. It’s a real part of the picture, not the whole thing.
The year that seemed to disappear may not feel short because there was less time in it. There may simply be fewer moments your memory can use to break it apart. The calendar still gave you 365 days. What changes is how many of them became sharp enough to leave a marker behind.
