Why does time go by so fast?

Time feels fast when you hurry through your days, and maybe more so when your days look alike. Two weeks in the life of one made-up person, Dana, show the idea.

In the first week, every day is the same. Dana hurries through work, eats dinner, looks at her phone and goes to bed. On Sunday she cannot tell Tuesday from Wednesday. All she can say about the week is “I worked.”

In the second week, three days are different. On Tuesday she has dinner with an old friend. On Thursday she goes to her first swimming lesson. On Saturday she drives to a town she has never visited. On Sunday she can name each of those days.

Both weeks were seven days of 24 hours, which is 168 hours. But when Dana looks back, she remembers one thing from the first week: work. From the second week she remembers four: work, the dinner, the lesson and the drive. So the first week can feel shorter.

Try it. Can you name one thing you did last Tuesday that you did not do on Monday? If you cannot, the two days already look the same in your memory.

Researchers have found more than once that people who feel rushed say time goes fast. The link with days that look alike is less sure: some studies found it and others did not, according to one paper that summed up the research (Landau and Ryu, 2026).

People who feel rushed say time goes faster.

In one study, people said how fast the last week, month and year had passed, and how rushed they felt. The people who felt most rushed said that the time had passed more quickly (Janssen, Naka and Friedman, 2013). A larger, earlier study came to a similar result (Friedman and Janssen, 2010).

A year can feel shorter when you sort it into big groups, such as “work” and “family”.

One group of researchers says that as people get older, they sort what happens to them into bigger groups like these, so less seems to have happened. In three experiments, people who were led to think of their past year in groups said it had gone by faster than the others did (Landau and colleagues, 2018).

Good times go by fast too.

The paper that summed up the research describes four studies in which people who were more satisfied with their summer or their year also said it had passed more quickly. So a year can feel fast because little in it stood out, or because it was a good year.

Time does not seem to go much faster for older people than for younger people. People of every age say that time passes quickly. In one large study of people from their teens to the age of eighty, the difference between young and old was very small (Friedman and Janssen, 2010). The one clear difference was about the last ten years, which older adults said had gone by faster.

In a study in the United Kingdom, 76% of people agreed that Christmas seems to come around more quickly each year. Older people did not agree more than younger people did (Ogden and colleagues, 2024).

You may have heard that a year feels shorter because it is a smaller part of your life as you age. The paper that summed up the research found no direct test of this idea, and the idea cannot explain why a single week feels fast (Landau and Ryu, 2026).

You may be able to slow down time a little by hurrying less, and by giving each week a few days that stand out. No study has proved a sure way, but these three steps follow from what the studies found.

Plan one thing less each day.

When every hour is full, you rush, and people who feel rushed say that time flies. Leave a gap between two tasks. Say no to one thing this week.

Do one new thing a week.

The new thing can be small: a different road home, a new dish, a call to an old friend. It gives the week a day you can tell from the others.

Write down what you did, and read it on Sunday.

Three lines an evening are enough: “Dinner with Sam. Rain all day. Fixed the bike.” On Sunday, read the week back. You will see seven separate days.

Much of a week goes to sleep and work, and the rest goes to many small things that are easy to lose count of. You cannot measure how fast a week feels, but you can count where its hours went. Start with one sum.

The 72 hours that are left come to three full days. To find out where yours go, write down what you do for one week, which is called a time audit. For a quick guess first, try the Where did my week go? calculator.

If many of your free hours go to your phone, read how to stop doomscrolling.

Then try this test.

A week is hard to remember. By Sunday you cannot tell the days apart, and you can only guess where the hours went.

A good way to keep track is to write or say a few words about your day, and have the hours counted from them. Then every day leaves a record, and there is no timer to start. Most journaling apps only ask how your day felt. They do not show you where the hours of the day went.

One app built for this is Think in Numbers, a smart journaling app with time tracking built in.

You write or say your day in your own words, as it happens or all at once. The app reads what you wrote and counts the hours that went to each part of it: your work, sleep, time with people, your phone, and the time you never mentioned (shown as unaccounted). Then it shows those hours over days and weeks. So you can look back at any day and see what you did, and where the hours of the week went.

1. You write your day

2. It counts the hours

• Swimming0m
• Work0m
• Sleep0m
• Unaccounted24h

3. It shows your week

S

M

T

W

T

F

S

Swimming this week: 0m

On 6 of 7 days. The gap is the day without it.

An example day and week.

Play again

Write my first day

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Or scan with your phone's camera.

For iPhone and Android. Try it on your own day before you pay.

Every source below was read for this page: the first two in full, and the summary of the other three.

1. Landau, M. J. and Ryu, Y.-J. (2026). The time of your life: mapping the mechanisms behind life tempo judgments. Frontiers in Psychology, 16, 1747171.
2. Ogden, R., Alatrany, S. S. J., Flaiyah, A. M., ALdrraji, H. A. S., Musa, H. S., Alatrany, A. S. and Al-Jumeily, D. (2024). Distortions to the passage of time for annual events: exploring why Christmas and Ramadan feel like they come around more quickly each year. PLOS ONE, 19(7), e0304660.
3. Janssen, S. M. J., Naka, M. and Friedman, W. J. (2013). Why does life appear to speed up as people get older? Time & Society, 22(2), 274 to 290.
4. Friedman, W. J. and Janssen, S. M. J. (2010). Aging and the speed of time. Acta Psychologica, 134(2), 130 to 141.
5. Landau, M. J., Arndt, J., Swanson, T. J. and Bultmann, M. N. (2018). Why life speeds up: chunking and the passage of autobiographical time. Self and Identity, 17(3), 294 to 309.