The Glorious Mysteries of the Rosary are said on Wednesdays and Sundays. The Glorious Mysteries consist of five events in the life of Jesus and Mary, which are:

1. The Resurrection of Jesus
2. The Ascension of Jesus
3. The Descent of the Holy Spirit
4. The Assumption of Mary
5. The Coronation of Mary as Queen of Heaven and Earth

Therefore, the mystery of the Rosary that is said on Sunday is the Glorious Mysteries.