The present application aims to be an aid to the devotional life of every Orthodox Christian, especially the pious pilgrims of the Holy Name Mount Athos, allowing them to live according to the rhythms of the Holy State. More specifically, the following features are provided: ▶ Monitoring the time of the Holy Monasteries of Mount Athos (Byzantine Time), ▶ Detailed Calendar and Standard of the services held in the Holy Monastery of Megistis Lavra, according to the Old (Holy) and New (Secular) Ca