Have you ever looked at the clock at 10:07 a.m., thought, “I have LOADS of time,” answered one message, checked one thing… and then somehow it was 1:43 p.m.?
Excuse me. Who authorized that? 😂
Or maybe you have an appointment at 3:00, which means your brain has decided the entire day is now unavailable because SOMETHING IS HAPPENING LATER.
Welcome to adult ADHD and the very relatable experience people often call time blindness.
What does “time blindness” mean?
It is an informal phrase for difficulty noticing the passage of time, estimating how long something will take, planning around deadlines, or switching gears early enough to be somewhere on time. It is not itself an official ADHD diagnostic criterion.
Research does, however, support differences in aspects of time perception in ADHD. A 2023 review of adult ADHD studies found evidence of difficulties in areas including time estimation, reproduction and management, while also noting that adult research is still limited and individual studies do not all reach the same conclusions. A 2024 systematic review and meta-analysis also found an overall difference in time-perception performance in ADHD across the lifespan.
In other words: the struggle can be real without pretending every ADHD brain experiences time in exactly the same way.
The five-minute task that eats an afternoon
Brain: “I’ll just quickly check something.”
Also brain, 74 minutes later: “Good news. I now know everything about a stranger who reorganized her pantry in 2022.” 😂
The CDC notes that adults with ADHD can have difficulty managing attention, completing lengthy tasks, staying organized and controlling behaviour. When attention and organization are already demanding, keeping track of time can become another thing your brain is trying to juggle.
And then there’s Waiting Mode
You have an appointment at 2:30.
Could you start something useful at 10?
Technically, yes.
Will your brain allow such reckless behaviour when SOMETHING IS HAPPENING LATER?
Apparently not. 😂
So you hover, check the time, decide it is too early to get ready, check again, and avoid starting anything substantial because you are worried you will get absorbed and miss the appointment.
Make time more visible
Use alarms for actions, not just events. Instead of one alarm saying “appointment at 3,” try 1:45 — wrap up; 2:00 — get ready; 2:15 — shoes, keys, leave.
Time routines before estimating them. If you swear getting ready takes 15 minutes but reality keeps producing 42, collect actual data. We are not judging ourselves. We are conducting extremely glamorous scientific research in sweatpants.
Add a transition buffer. A 20-minute drive does not mean leaving 20 minutes before the appointment. Apparently we also need time to find the keys, locate the phone that is in our hand, go back for the thing we forgot and stand beside the car wondering why we came outside.
Try visible countdowns. A visual timer or countdown can make passing time harder to lose track of, especially when you are absorbed in something interesting.
Work backward. If you must arrive at 3:00, your real deadline might be 2:15 leave, 2:05 shoes and coat, 1:45 finish the current task, 1:30 start getting ready.
Don’t turn a system problem into a character judgment
Running late can affect other people, and ADHD does not erase responsibility. Systems and communication still matter.
But “I need a better way to estimate and manage time” gives you something useful to change. “I’m terrible at being an adult” does not.
Today’s tiny experiment
Pick ONE routine you consistently underestimate and actually time it today.
Not how long you think it takes. Not how long it takes in the fantasy version of your life where nobody loses a shoe and your phone is always charged.
How long does it really take?
And if you started reading this at 9:12 and it is suddenly Thursday… welcome. You’re among friends. 😂
Sources: CDC, ADHD in Adults (2026); Mette C., Time Perception in Adult ADHD: Findings from a Decade—A Review (2023); Metcalfe KB et al., Time-Perception Deficits in ADHD: A Systematic Review and Meta-Analysis (2024).