Abstract: Most recent publication of the lecture of Martin Heidegger “Augustinus: Quid est tempus? Confessiones lib. XI” (Gesamtausgabe. Bd. 80.1. Frankfurt a. M.: V. Klostermann, 2016. S. 429-456) served as a motive and fundamental material for this article. The lecture was delivered on October 26, 1930. In this lecture, Heidegger gradually analyzes the contemplations of St. Augustine about time, leaning on the content of the eleventh book of the Confessions. Major attention is this article is given to the conceptual aspects that relate to the Augustinian understanding of time, however, considering the accents and notes made by Heidegger regarding Augustine’s contemplations. The key method of research is the comparative analysis of St. Augustine’s and M. Heidegger’s ideas regarding the concept of time. The conducted analysis of Heidegger’s lecture is aimed not only at describing the conceptual aspects of Augustine’s contemplations about time, but also allows tracing Heidegger’s precise interpretation of St. Augustine, focus of his attention and final conclusions.