In Western Christianity, The Conversion of Saint Paul the Apostle, also known as the Pauline conversion, Damascene conversion, Damascus Christophany and the "road to Damascus" event, was, according to the New Testament, an event in the life of Saul/Paul the Apostle that led him to cease persecuting early Christians and to become a follower of Jesus.
This day is traditionally observed as a Feast, which includes reciting the Gloria.
Here are some ways you can observe this day according to Western Christian tradition: