Why Does Time Go Faster as You Get Older? Every Age, Explained

At five, one year is 20% of your whole life. At fifty, it's 2%. That shrinking slice is the usual explanation for why the years speed up, and it's only part of the story. Here's a whole life from 2 to 80, and what steals your time at each age.

Age 2: there's no such thing as later

Toddlers seem to have all the time in the world, but a two-year-old doesn't have a future in their head yet. Say "we'll go to the park later" and "later" might as well be Klingon. When researchers asked three-year-olds to name something they would do tomorrow, only a minority could. Imagine being told "five more minutes" when you have no idea what a minute is. Suddenly tantrums make a lot of sense.

One year is 50% of a two-year-old's life, which makes a second birthday technically a midlife crisis. And you won't remember it. In a study of 6,641 people, the average first memory came from age 3.2. Nearly 40% claimed a memory from age 2 or younger, which the researchers say is probably made up. That birthday you think you remember is more likely a photo your aunt showed you. Our post on false memories shows how easily that happens.

Age 5: a year lasts forever

In 1877 the French philosopher Paul Janet argued that we measure every stretch of time against the life we've already lived. At 5, a year is 20% of your life. At 50, it's 2%. By his maths, a year at 50 feels about as long as 36 days did when you were five.

A ten-week summer holiday is almost 4% of a five-year-old's life. At 40, the same ten weeks are half a percent.

Neuroscientist David Eagleman says the fraction idea sounds right but isn't the answer, because a brand-new trip feels long at any age. His example is a weekend on the moon. Nobody comes home from that saying it flew by.

Age 10: everything is new

One summer at ten might hold a new bike, a broken arm, a best friend, a worst enemy, a secret base and a jellyfish. A summer at 40 holds an email.

Your brain saves new things and skips the repeats. Looking back, it judges how long a stretch lasted by how many new memories are in it. At ten, every day is a pilot episode, so the summer gets saved like a whole box set.

In the lab this shows up as the oddball effect. Show the same picture over and over, slip in something new, and the new one seems to last longer, about 35% longer in the first experiments. Eagleman's team also dropped volunteers backwards off a 31-metre tower into a net. They later guessed their own fall had lasted 36% longer than other people's, though wrist displays proved they hadn't seen anything faster mid-fall. The stretch happened in the replay.

Age 16: the years you'll keep

Sixteen can feel like a waiting room, but from about 10 to 30 your brain saves far more memories than at any other time, a pattern called the reminiscence bump. Ask 70-year-olds for their five most important memories and most come from one decade, their twenties. One theory is that these are the years you work out who you are, so your brain keeps all the receipts.

It's even picking your soundtrack. Spotify data showed men's music taste is shaped most by songs from when they were about 14, and women's by songs from about 13. Radiohead's "Creep" was the 164th most-played song for 38-year-old men, who were 14 when it came out. Ten years either side, it wasn't in the top 300.

Age 25: autopilot

Adulthood's prize is the same Tuesday about 2,000 times. When psychologist Wendy Wood had people log what they were doing every hour, about 43% of it was habit, done on autopilot while thinking about something else. That's how you arrive at work for the 400th time with no memory of the journey.

Routine shrinks in memory. In six studies, hours spent on routine were remembered as shorter. The sneaky part is that a dull afternoon can drag while you're in it. Only later does the whole month fold up like a deckchair.

Then time pressure moves in. People aged 20 to 59 are the most likely to feel time racing. Physicist Adrian Bejan says tiredness makes time pass faster, so the all-nighter before a deadline is a fast-forward button you press on yourself. A year is now 4% of your life, about 73 days in five-year-old time.

Age 40: where did the decade go?

When researchers asked how fast the last hour, week, month or even year had gone, age made no difference. The only answer that changed with age was how fast the last ten years had gone.

A follow-up with 1,865 adults found the same pattern, and the researchers' best explanation was time pressure more than age. Adults with children said the last ten years had gone faster than adults without.

Old events start to feel recent too, a time glitch called the telescoping effect. 2014? That was, what, five years ago? One year is now 2.5% of your life, or 46 days in five-year-old time.

Age 60: fewer pictures per hour

Adrian Bejan says clock time and mind time aren't the same thing, and your mind feels time pass each time the picture in your head changes. Your eyes jump three to five times a second, taking somewhere around 11,000 to 18,000 snapshots an hour. With age, he says, the nerve paths carrying those pictures get longer and more tangled, then wear down. Fewer pictures per hour means each hour feels shorter. This is one physicist's model, not a tested result.

There is a test you can try at home, though. In a Brazilian study, people closed their eyes and counted off two minutes in their heads. People aged 15 to 29 stopped at about 115 seconds. The over-50s, with an average age of almost 60, called it at about 87 seconds, nearly half a minute early. Somewhere, a boiled egg is very runny.

Age 80: days drag, years vanish

Picture a Tuesday afternoon in a waiting room, where the clock has said 3:14 for what feels like a week. Then you get home and somehow it's December again.

That's because you have two clocks. One times the moment you're in, and the other measures time looking back, from memory. Psychology writer Claudia Hammond calls the split the holiday paradox. A week somewhere new flies while you're there and feels huge afterwards. A routine week drags, then leaves almost nothing behind.

In the 2020 lockdown, a study of 604 UK adults found that over 80% felt time had gone strange. People over 65, and people unhappy with their social contact, were more likely to feel it crawling. The quality of the company counted for more than the amount.

Marc Wittmann, who surveyed 499 people aged 14 to 94 about how fast their last ten years had gone, found no further speed-up for older people. The same plateau showed up in the Netherlands, New Zealand and Japan. And if Janet's ratio ruled, you'd have lived half your felt life by about age nine, which would mean you peaked on the bouncy castle.

Time doesn't fly because you're old. It flies when nothing new happens, at 8 or at 80. So do one new thing every week, whether it's a new route, a new place, a new skill or a new person. Good company and sleep help as well. Your neighbours might hate the ukulele, but your memory won't.

The short version

• Paul Janet's 1877 idea, that each year is a smaller slice of your life, doesn't match how people actually feel time.
• Looking back, your brain judges time by how many new memories a stretch holds, so routine years shrink and new ones stretch.
• The sense that the last decade raced by grows with age, then levels off, and time pressure explains it better than age.
• To slow the clock at any age, do one new thing every week, and get good company and sleep.