Trinity Sunday

Trinity Sunday celebrates the mystery of the Holy Trinity: Father, Son, and Holy Spirit. This day helps us reflect on God’s nature as three persons in one. It reminds us of the unity and love within the Trinity. We are invited to grow in our understanding of this mystery and how it shapes our faith. The celebration calls us to recognize God’s presence in our lives and to live in a way that reflects His love and unity.

Click on the appropriate year below to see resources, themes, homilies, and more. See how to determine the correct year.

Trinity Sunday Year A
Trinity Sunday Year B
Trinity Sunday Year C

Mass Readings for Trinity Sunday Year A

See resources, homilies, and more for the Trinity Sunday Year A readings here.

• First reading – Exodus 34:4B-6, 8-9: Moses, following God’s instructions, ascends Mount Sinai, where God proclaims His compassionate nature; Moses worships and pleads for God’s presence despite the people’s stubbornness.
• Responsorial Psalm – Daniel 3:52, 53, 54, 55, 56: Blessed is the Lord, God of our ancestors, exalted and praised in His sanctuary, on His majestic throne, and above all creation, forever renowned and glorious.
• Second reading – 2 Corinthians 13:11-13: We should find joy, improve ourselves, support each other, strive for harmony, and live peacefully, ensuring God’s presence among us. Greet each other warmly, as all saints do, and may the grace of Jesus, God’s love, and the Holy Spirit’s communion be with us all.
• Gospel – John 3:16-18: God expressed immense love for humanity by giving His only Son, so that believers would gain eternal life and not perish. The purpose of this divine act was not condemnation, but to offer salvation. Belief in His Son brings salvation, while disbelief results in condemnation.

Mass Readings for Trinity Sunday Year B

See resources, homilies, and more for the Trinity Sunday Year B readings here.

• First Reading –Deuteronomy 4:32-34, 39-40: Moses urges reflection on God’s unique acts for Israel: speaking from fire, choosing them miraculously, and showing unmatched power. He emphasizes that the LORD is the only God and calls for obedience to ensure prosperity.
• Responsorial Psalm – Psalm 33: The Lord’s word is true, His actions dependable, creating the heavens and earth with His command. He watches over and sustains those who revere Him and hope in His love.
• Second Reading – Romans 8:14-17: As God’s children, led by His Spirit, we’re freed from fear, adopted, and can call Him “Father”. This Spirit affirms our divine inheritance with Christ, linking suffering with shared glory.
• Gospel – Matthew 28:16-20: On a Galilean mountain, the eleven disciples met Jesus as instructed. Despite some doubts, they worshipped Him. Jesus declared His divine authority and commanded them to make disciples of all nations, baptize them, and teach His commands, assuring His continual presence until the end of time.

Mass Readings for Trinity Sunday Year C

See resources, homilies, and more for the Trinity Sunday Year C readings here.

• First Reading – Proverbs 8:22-31: God’s wisdom declares it was created first, before the earth and oceans. Present during creation, it rejoiced beside God, delighting in the formation of the world and humankind.
• Responsorial Psalm – Psalm 8: In awe of the heavens and stars, I marvel at human significance and dignity, honored by God with dominion over all creatures of earth, sea, and air.
• Second Reading – Romans 5:1-5: Justified by faith, we are at peace with God through Jesus, and rejoice in hope. Our sufferings produce endurance, character, and hope, filled with God’s love through the Holy Spirit.
• Gospel – John 16:12-15: Jesus acknowledged the disciples’ limitations in understanding and promised the coming of the Spirit of truth. This Spirit would guide them into all truth, speaking not independently, but revealing future events and glorifying Jesus by sharing His teachings. Jesus affirmed that the Spirit’s revelations are from His divine authority.

More About Lectionary Cycles

Trinity Sunday celebrates the mystery of the Trinity. To understand what is read at Mass on this day, it’s important to know the difference between a Bible and a Lectionary. The Bible is a complete collection of sacred texts. The Lectionary contains specific readings for Mass. These readings are arranged by the liturgical calendar. Different translations of the Bible, approved by the Church, are used in the Lectionary. To learn more, visit USCCB – Questions About the Lectionary. This helps us better appreciate the readings, like those on Trinity Sunday.

How to Determine the Liturgical Year

The liturgical cycle is a three-year sequence of A, B, and C.

• 2024 is Year B
• 2025 is Year C
• 2026 is Year A
• 2027 is Year B
• 2028 is Year C
• 2029 is Year A
• 2030 is Year B
• 2031 is Year C
• … and so on