[Destroyer]

I think it’s because when you were a kid it was longer in terms of how long you’ve been here. Like say, you’re 8 years old. A summer is literally 3 percent of your life at that point. So you feel it. As your age grows, three months time falls down to like 1.2% of your life at age 20. As you get even older, the percentage continues to drop. It’s likely a combination of our perception of time as we exist for more time.
My two cents