Why do we have Holy Days of Obligation?
Feast Days, or Holy Days, are days which are celebrated in commemoration of the sacred mysteries and events recorded in the history of our redemption, in memory of the Virgin Mother of Christ, or of His apostles, martyrs, and saints, by Holy Mass and rest from work. A feast not only commemorates an event or person, but also serves to increase the spiritual life by reminding us of the event it commemorates. At certain hours Jesus Christ invites us to His vineyard (Matthew 20:115). He is born in our hearts at Christmas. On Good Friday we nail ourselves to the cross with Him. At Easter we rise from the tomb of sin. And at Pentecost we receive the gifts of the Holy Ghost.
Sub Tuum Praesidium,