How to deal with interrupted sleep when calculating Cycle Shift?

A community for info and discussions about the disability Non-24-Hour Sleep/Wake Phase Disorder - a rare, debilitating, chronic, neurological Circadian Rhythm disorder which severely affects the body's ability to synchronise to the 24-hour day/night cycle. See sticky post for FAQ + useful info.

Thank you r/ADHD you are amazing!

We're an inclusive, disability-oriented peer support group for people with ADHD with an emphasis on science-backed information. Share your stories, struggles, and non-medication strategies. Nearly two million users say they 'feel at home' and 'finally found a place where people understand them'.