Father, Son and Holy Spirit – Three beings, One God

Trinity Sunday is the first Sunday after Pentecost in our liturgical calendar. Trinity Sunday celebrates the Christian doctrine of the Trinity, the three Persons of God: the Father, the Son, and the Holy Spirit.

A distinctive feature of Lutheran worship is the recitation of the Athanasian Creed on Trinity Sunday during Matins. It may also supplant the Nicene Creed during the Mass.

In the early Church, no special Office or day was assigned for the Holy Trinity. When the Arian heresy was spreading, the Fathers prepared an Office with canticles, responses, a Preface, and hymns, to be recited on Sundays. In the Sacramentary of Gregory the Great there are prayers and the Preface of the Trinity. During the Middle Ages, especially during the Carolingian period, devotion to the Blessed Trinity was a highly important feature of private devotion and inspired several liturgical expressions. Sundays are traditionally dedicated to the Holy Trinity.