I'm like that too. Melatonin helps me fall into 24-hour rhythm. I take 1 mg in slow-release form, 2-3 hours before desired bed time. My bed time is still prett

I'm like that too. Melatonin helps me fall into 24-hour rhythm. I take 1 mg in slow-release form, 2-3 hours before desired bed time. My bed time is still pretty variable, shifting 2-3 hours back and forth but at least it's not hopelessly drifting forward every day. I do sleep a lot, 9-10 hours (no alarm clock), which could be because of melatonin (1 mg is a rather large dose). See here for a lot of details about melatonin dosage and timing: https://slatestarcodex.com/2018/07/10/melatonin-much-more-than-you-wanted-to-know/ https://slatestarcodex.com/2018/07/10/melatonin-much-more-th... Relevant quote for non-24-hour sleep–wake disorder: And what about non-24-hour sleep disorders? I think the goal in treatment here is to advance your phase each day by taking melatonin at the same time, so that your sleep schedule is more dependent on your own supplemental melatonin than your (screwed up) natural melatonin. I see conflicting advice about how to do this, with some people saying to use melatonin as a hypnotic (ie just before you go to bed) and others saying to use it on a typical phase advance schedule (ie nine hours after waking and seven before sleeping, plausibly about 5 PM)