These 3 hours (“tre ore”) commemorate the three hours that Jesus hung on the Cross.
12-3 pm Rosary, Stations of the Cross, Divine Mercy Chaplet
3 pm Passion Liturgy English
Good Friday is an obligatory day of fasting and abstinence for Catholics.
Fast & Abstinence
For members of the Latin Catholic Church, the norms on fasting are obligatory from age 18 until age 59. When fasting, a person is permitted to eat one full meal, as well as two smaller meals that together are not equal to a full meal. The norms concerning abstinence from meat are binding upon members of the Latin Catholic Church from age 14 onwards.
If possible, the fast on Good Friday is continued until the Easter Vigil (on Holy Saturday night) as the "paschal fast" to honor the suffering and death of the Lord Jesus and to prepare ourselves to share more fully and to celebrate more readily his Resurrection.
So vividly is the Church impressed with the remembrance of the great Sacrifice offered today on Calvary, that she refrains from renewing, on her Altars, the immolation of the Divine Victim: she contents herself with the partaking of the sacred mystery by Communion.
The Liturgical Year by Dom Gueranger