Archimandrite Raphael (Karelin) serves the Lord in the land of Iveron (Georgia) in its capital - the God-protected city of Tbilisi. His service takes place mainly in the church in the name of the Holy Blessed Grand Duke Alexander Nevsky; he is also a teacher at the Tbilisi Theological Academy. He is known to Russian Orthodox readers as the author of many sermons and articles published in various collections, including as memorable, as well as soulful, instructive appendices to Orthodox prayer books and calendars. In the book “The Mysticism of Earthly Time,” Archimandrite Raphael examines calendars in detail : Mohammedan, Gregorian and Julian. And he explains why the Julian calendar, from an Orthodox point of view, is the standard calendar. The book is structured in the form of "Question - Answer", which allows you to explain complex church symbolism and dogma in a simple, accessible form. After reading the book of Archimandrite Raphael, it becomes clear that time is not only a physical concept, but also a mystical one.