What is TRINITY SUNDAY? It is the Roman Catholic of celebrating the HOLY TRINITY after the Pentecost.
Remember the HOLY TRINITY?
TRINITY is defined as:
GOD = the Father, the Son & the Holy Spirit.
The FATHER is the GOD.
The SON is the GOD.
However, GOD IS THE ONLY HOLY SPIRIT.
It is the sign of the Cross + In the name of the Father, the Son and the Holy Spirit.