Why Do We Say ‘Time Flies’ When We’re Busy?

Time flies when we're busy because our brain is focusing on other things and not counting how much time has passed.

Imagine you’re playing with your favorite toy, a train set. You don’t notice the minutes passing by because you’re too busy making the trains go vroom-vroom around the track. But when you stop playing, you look at the clock and think, “Wow, that was fast!” It feels like time flew past you.

When you're busy, your brain is working hard on something else, like solving a puzzle or chasing a friend. That means it doesn’t pay as much attention to how long you've been doing something. It's like when you’re eating a big bowl of cereal and don't notice the minutes passing by because you're too busy spooning your favorite cereal.

But when you're not busy, maybe sitting quietly on the couch, your brain has more time to notice things, like how long it takes for the sun to go down. That’s why time seems slower when we’re not doing much.