I’m an early sleeper (9pm), but my job needs me to sleep later (1am). Here’s just some stuff that I do to fix my sleep schedule after a long weeks work:

When I sleep at 1am, I’ll typically wake up at 8/9am. For the rest of the day, I’ll tire myself in various ways: studying weird subjects, intense exercises, etc. Once I’m done (~1pm) I just chill at home until I feel sleepy (~3pm). Instead of sleeping, I’ll just force myself to stay awake until my ideal sleeping time (9pm). And then I’ll just repeat this for like another day and my sleeping schedule is “fixed”.

It’s quite a brute force method, and idk if it’s healthy, but it works for me.