The article proposes to expand the understanding of the fairy-tale wizard Ded Moroz (Father Frost) as a myth and cultural and symbolic image using sociological approaches. As an analysis methodology, the concept of social construction of reality was applied, which made it possible to characterize the social construct «Ded Moroz (Father Frost)», which performs numerous social functions for the adult population and additional, specific for children. The main functions include participation in the formation of national identity, traditions, political distinction, economic, educational, educational, socializing, additionally described as an incentive in projective research methods. Arguments are presented to prove that Ded Moroz (Father Frost) is not only an attribute of the cultural heritage of Russia, but also unites numerous ideas, social practices of children and the organization of the child's daily space, promotes the socialization of the modern young generation, participates in the intergenerational transmission of values and identity. The subjects and mechanisms of constructing processes, levels and possibilities of application in the periodization of childhood are highlighted. With the help of a representative empirical study of 2023 estimates by young people of the eventfulness of their childhood, including the situation of loss of faith in Ded Moroz (Father Frost) (average age 9.1 years), conclusions were drawn about social factors of stability and variability of the age of debunking the myth of the reality of the fairy-tale hero. Some hypotheses have been proposed for further research, including the new role of a «social worker and social defender» for Ded Moroz (Father Frost), the artificial lengthening of the period of trust in the fairy-tale character by the children themselves in order to receive gifts and entertainment.