Can confirm. Have a circadian rhythm disorder where I pretty much can't wake up earlier intentionally; very common in teens, but occasionally it sticks as an ad

Can confirm. Have a circadian rhythm disorder where I pretty much can't wake up earlier intentionally; very common in teens, but occasionally it sticks as an adult. In my case I actually cycle around, living >24 hour days left completely unchecked, which is probably worse than it sounds (but extroidinarily unlikely; guess I'm just lucky). The prescription is to get bright blue-spectrum light-box and have it within the field of view for 15-40 minutes in the morning. Or stare at the sun. I also cut out blue light at night (f.lux and custom arduino-controlled lighting.) People were built for the light; some more than others, but it still holds true. I go camping on occasion to reset it as well. Edit: For those without disorders it works similarly. Doing my routine would have you comfortably waking up a bit earlier each day, but just getting some sunlight in the morning and toning down the blue at night would work.