People with DSPD can't have "regular" sleep cycles, it's thought to be a genetic disorder where their cycle is offset a few hours from a regular sleep cycle. C

People with DSPD can't have "regular" sleep cycles, it's thought to be a genetic disorder where their cycle is offset a few hours from a regular sleep cycle. Couple that with society's 9-5 work schedule, you're in for a rough time unless you can find an employer who will accommodate.