Why 2023 went by so fast and an explanation for the 2020 theory

In your life, you grow to different ages. You may watch a movie once and it’ll feel long. Watch it again, and it’s shorter. That’s because your brain can expect it and because you grow with it. When you’re five, you only have 5 years to fill, thus time goes slower so you dont reach the end of that time. When you’re years older—13, 14, 15, etc—you have that X amount of age. That’s a lot of time! Because that’s so much time, you have more time to fill, comparatively to if you were 5. Does that make sense? 

When quarantine happened in 2020, we were all around 10-15 usually. That time went slow. Add more time. It goes faster.