Why do people often misremember past events?

People often misremember past events because their brain is like a messy toy box, full of pieces that can be mixed up and rearranged.

Imagine you have a favorite puzzle with your name on it. Every time you put it together, you might mix up some pieces or place them in slightly different spots. After a while, you remember the picture, but not exactly how it looked when you first finished it, maybe you added a new piece or swapped two.

Your brain works like that too. When you remember something, your brain doesn’t always use the exact same details as it did when the event happened. It uses what feels most familiar or easiest to recall, kind of like picking the pieces that look the most like they belong.

Sometimes, you might even mix up parts of different events, like remembering you got ice cream on Tuesday, but thinking it was on Wednesday because that's the day you usually get it.

Think of your memories like pages in a storybook. Sometimes the ink gets smudged or the pictures fade. You still know what the story is about, you just might not remember every tiny detail exactly how it was when you first read it.