eli5 why is it so easy to sleep later, but so hard to sleep earlier?

Question

I tried so hard the whole week to fix my sleeping time, but I fked it up in a single day.

In: 1

Answer 1

The simple answer is a human’s natural sleep cycle, absent any outside input, is a bit longer than 24 hours.

There are other biological systems that evolved that sync you up with the day/night cycle of the sun, mostly having to do with light levels.

Artificial light, both from light bulbs and screens, messes with those systems, resulting in it being really easy to stay up later, but very hard to get to sleep early.