The Great Horologion

The Great Horologion is a liturgical book used in the Eastern Orthodox and Eastern Catholic traditions. It contains detailed schedules and prayers for the daily cycle of services, including particular times for worship, hymns, and readings. Its purpose is to guide clergy and faithful through the rhythm of prayer throughout the day and night, ensuring the worship of God follows an organized, consistent structure. Essentially, it functions as a spiritual timetable, helping communities maintain their connection to divine worship at specific hours, emphasizing the importance of prayer in daily life.