Ash Wednesday and Good Friday are obligatory days of fasting and abstinence for Catholics. In addition, Fridays during Lent are obligatory days of abstinence.
For members of the Latin Catholic Church, the norms on fasting are obligatory from 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 onward.
Members of the Eastern Catholic Churches are to observe the particular law of their own sui juris Church.
If possible, the fast on Good Friday is continued until the Easter Vigil (on Holy Saturday night) and is known as the “paschal fast” to honor the suffering and death of the Lord Jesus, to prepare oneself to share more fully and to celebrate more readily His Resurrection.