ADHD is strongly associated with circadian rhythm dysfunction, particularly evening chronotype and delayed sleep-wake timing, affecting up to 80% of adults and 82% of children with the disorder. Interventions like melatonin, bright light therapy, and behavioral sleep programs successfully advance circadian phase and improve ADHD symptoms. The authors propose a clinical pathway combining routine circadian screening with behavioral interventions including fixed wake times, morning light exposure, and selective melatonin use.