The aim of the work is to establish the peculiarities of the organization of various aspects of life in the dynamics of the <i>winter/summer</i> seasons among students studying in the conditions of the photoperiod of the northern region (Khanty-Mansi Autonomous Area – Yugra) and the temperate climatic zone (Vladikavkaz). In the Khanty-Mansi Autonomous Area, among students of both sexes, the proportion of persons with evening chronotypes was higher than in Vladikavkaz. Among thenorthernyoung men, there were no persons with a <i>definite morning</i> chronotype, and among the Vladikavkaz students there was noone with a <i>definite evening</i> chronotype; in the southern region, the share of “larks” was higher. In the dynamics of <i>winter/summer</i> in all groups, an increase in the proportion of “larks” was found, less pronounced in young men. Among the students of Vladikavkaz in both seasons, young men predominated among <i>morning</i> chronotypes, the percentage of persons with an <i>arrhythmic</i> chronotype was higher among young women. The values of <i>the index of photoperiodic stability</i>, in general, characterize the chronotype of the examined students as rigid. In the organization of life in the social group of students, social generators of rhythm prevail over natural factors.