May 26 : Holy Trinity Sunday - One God in Three persons

Holy Trinity Sunday, is celebrated a week after Pentecost Sunday in honour of the most fundamental of Christian beliefs—belief in the Holy Trinity. We can never fully understand the mystery of the Trinity, but we can sum it up in the following formula: God is three Persons in one Nature. The three Persons of God —Father, Son, and Holy Spirit— are all equally God, and They cannot be divided.