Hi 1714alpha: There are certainly people with circadian rhythms that are not typical. Some people like to wake up early in the morning and go to bed early, the so-called larks or early types. Similarly, there are people who tend to wake up late and go to bed late the so-called owls or late types. This does make it harder for these folks to maintain the schedules that are usually dictated by society. Since I am a medical provider, I would defer comment about legal protections.

Adding to /u/MedPedsChief/, what you’re describing is something we think of as “social jetlag.” It’s similar to when you fly across multiple time zones and haven’t quite adapted to the local one; given some time and effort with shifting to your new local time zone, your body’s internal clock can sync up. However, with social jetlag, it’s like your body is flying to another timezone and it can be exhausting.

Ultimately, how people choose to reconcile the discrepancy between their internal clock and the one on the wall (mindful of work and social obligations) is a personal choice. If needed, your doctor may be a helpful resource.