Is celebrated on the first Sunday after Pentecost Sunday. The season of Trinity also know as Ordinary Time starts with the Second Sunday after Pentecost and runs until Christ the King Sunday, the last Sunday before the beginning of Advent.
On this day, the church rejoices in the impenetrable mystery that God is triune (three-in-one) — Father, Son, and Holy Spirit. How the Lord can be one God in three distinct persons is completely beyond the ability of any human to understand. By the power of the Holy Spirit, Christians accept this incomprehensible mystery as a fundamental article of faith.
The Colour of Trinity Sunday
The sanctuary colour for Trinity Sunday is dark green, although other shades of green are commonly used. Green has traditionally been associated with new life and growth. In Christian tradition, green came to symbolize the life of the church following Pentecost, as well as symbolizing the hope of new life in the resurrection.