Time is a constant factor in our existence. However, ancient and modern philosophy have not provided any satisfactory explanation for this ubiquitous phenomenon. To define means to find characteristic properties. Time has neither nature nor properties, except for one property - irreversibility. Philosophers who worked on this problem either retreated, admitting their intellectual defeat, or tried to define one unknown by another unknown, fell into tautology, or, at best, replaced the language of philosophical judgments and definitions with the language of poetry: allegories, metaphors and allegories, that is, figurative the language of ancient thinkers. We find the most profound discussions about time in Plato and St. Augustine. Plato in his famous “Dialogues” pointed out that before the creation of the world time did not exist. The Divine Idea remained in eternity as a model of the cosmos. Time arose along with the universe; it is only a shadow and likeness of eternity. “Time arose along with the sky, so that, having been born at the same time, they would disintegrate at the same time if such a disintegration occurred for them.” Source: u003d3141674