Good Friday, is the English designation of Friday in Holy Week ,that is, the Friday on which the Church keeps the anniversary of the Crucifixion of Jesus Christ.

From the earliest times the Christians kept every Friday as a feast day; and the obvious reasons for those usages explain why Easter is the Sunday par excellence, and why the Friday which marks the anniversary of Christ's death came to be called the Great or the Holy or the Good Friday. The origin of the term Good is not clear. Some say it is from "God's Friday" (Gottes Freitag); others maintain that it is from the German Gute Freitag, and not specially English. Sometimes, too, the day was called Long Friday by the Anglo-Saxons; so today in Denmark.

The Roman Catholic tradition includes specific prayers and devotions as acts of reparation for the sufferings and insults that Jesus suffered during His Passion on Good Friday. These Acts of Reparation to Jesus Christ do not involve a petition for a living or deceased beneficiary, but aim to repair the sins against Jesus. Some such prayers are provided in the Raccolta Catholic prayer book (approved by a Decree of 1854, and published by the Holy See in 1898) which also includes prayers as Acts of Reparation to the Virgin Mary.