Individual differences in diurnal preferences and circadian rhythms are viewed as an interesting dimension of human personality. Previous research has examined various psychological correlates of diurnal preference. Evening types reported psychological and psychosomatic disturbances more frequently and intensively than morning types and morning types have a healthier lifestyle than evening types. Depression was also related to eveningness as were bulimic behaviour and seasonal affected disorders (SAD). Given these studies, one would expect a positive relationship between satisfaction with life or happiness (general well-being; Diener et al. (J Pers Assess 49:71-75, 1985)) and morningness. There was a significant positive correlation between morningness and satisfaction with life (r = 0.177; p = 0.023; N = 164).