My personal theory is that the novelty of an experience is not the only factor. I think the notion that time passes slower when you're young is because you didn

My personal theory is that the novelty of an experience is not the only factor. I think the notion that time passes slower when you're young is because you didn't have much of it yet. When you're 10, 1 minute compares to your experience: 10 years. Now when you're 30 that same minute is now compared to 3 times more, based on your experience.