The First Saturday Devotion is a Catholic practice that involves attending Mass on the first Saturday of the month and participating in certain other activities:
Confession: Go to confession, which can be done up to eight days before or after the First Saturday
Holy Communion: Receive Holy Communion at Mass on the First Saturday
Rosary: Pray five decades of the Rosary
Meditation: Meditate on the mysteries of the Rosary for 15 minutes