Trinity Sunday is the first Sunday after Pentecost in the Western Christian liturgical calendar, and the Sunday of Pentecost in Eastern Christianity. Trinity Sunday celebrates the Christian dogma of the Trinity, the three Persons of God: the Father, the Son, and the Holy Spirit.^[1]

Trinity Sunday is celebrated in all the Western liturgical churches: Roman Catholic, Anglican, Lutheran, (most) Presbyterians, Methodists, and many churches within the Cooperative Baptist Fellowship.