The majority of the adults with ADHD have chronic difficulty to go to bed on time. This leads to a shorter sleep duration and daytime sleepiness that may aggravate the inattention problems of ADHD. This sleep pattern is also known as a delayed sleepphase, and the patients as ‘eveningtypes’. The other way round, eveningtypes have been associated with impulsiveness. The scope of this presentation is to study the impact of this sleep pattern in adults with ADHD on mood (i.e. seasonal affective disorder), eating habits (like timing of meals and binge eating), activity patterns (like nightshift work and light at night) and health in general, i.e. obesity and cancer.