The Joyful Mysteries are a set of five events in the life of Jesus and Mary that are traditionally prayed on Mondays, Saturdays, and Sundays of Advent. The Joyful Mysteries are:

1. The Annunciation: The angel Gabriel announces to Mary that she will conceive and bear a son, Jesus.
2. The Visitation: Mary visits her cousin Elizabeth, who is also pregnant, and they share in their joy.
3. The Nativity: Jesus is born in Bethlehem.
4. The Presentation: Mary and Joseph present Jesus in the temple, where they meet Simeon and Anna.
5. The Finding in the Temple: Jesus is found in the temple after being lost for three days.

The Joyful Mysteries are part of the Rosary, a form of prayer that involves the repetition of prayers and meditation on the life of Jesus and Mary. During the recitation of the Rosary, each mystery is announced, followed by the recitation of one Our Father and ten Hail Marys while meditating on the mystery.