05/29/2026
Trinity Sunday commemorates the Christian doctrine of God: the Father, the Son, and the Holy Spirit—three persons in one substance, an eternal community of love. Observed on the first Sunday after Pentecost, Trinity Sunday marks the beginning of the Trinity Season (or Trinitytide), also called the Season after Pentecost or Ordinary Time. Trinity is a fitting name for this season because the focus shifts from the great feasts of sacred history—Advent, Christmas, Epiphany, Ascension, Easter, and Pentecost—to the ongoing life of Christian growth in the love of our Trinitarian God.
The Anglican Roots of Trinity Sunday
Now celebrated by Christians of all denominations, Trinity Sunday has a robust Anglican heritage. Anglo-Saxons celebrated a feast dedicated to the Trinity as early as the 9th century, although the date’s standardization occurred much later. It has long held a connection with St. Thomas Becket, the 12th-century Archbishop of Canterbury and martyr. Becket was consecrated as a bishop on the first Sunday after Pentecost. Following his assassination in 1170 and his canonization shortly thereafter, the day gained powerful significance in the English tradition. In 1334, Trinity Sunday became an official observance for the first Sunday after Pentecost across the Western Church.
https://anglicancompass.com/trinity-sunday-a-rookie-anglican-guide/