Article — Sabetti-Barrett, Compendium of Moral Theology
Article III. On the Days of Abstinence Alone, of Abstinence Together with Fasting, and of Fasting Alone
I say. § 1. The law of abstinence alone is to be observed on every Friday.
§ 2. The law of abstinence together with fasting is to be observed on Ash Wednesday, on Fridays and Saturdays of Lent and on Ember days, on the vigils of Pentecost, of the Mother of God assumed into heaven, of All Saints, and of the Nativity of the Lord.
§ 3. The law of fasting alone is to be observed on all the remaining days of Lent.
§ 4. On Sundays or feasts of precept the law of abstinence, or of abstinence and fasting, or of fasting only, ceases, except for a feast in the time of Lent; nor are vigils anticipated. Likewise it ceases on Holy Saturday after noon (Can. 1252).
By this canon the days are assigned on which abstinence alone is commanded; abstinence and fasting; fasting alone; and on which the command of one, the other, or both ceases. Finally, the anticipation of vigils is removed.
Wherefore outside Lent no day is of fasting alone; within Lent no day of abstinence alone is enumerated; outside Lent the days of fasting together with abstinence are thirteen, namely the nine weekdays of the Ember Days and four vigils; within Lent the days of fasting and abstinence are fifteen and a half, namely the first and second Wednesday, and all the Fridays and Saturdays except the afternoon of Holy Saturday. The remaining days of Lent, except Sundays, are days of fasting alone; the remaining Fridays of the year are days of abstinence alone. But if the law of which we are treating falls on some feast of precept, the law of abstinence, fasting, or both together ceases, except for a feast in the time of Lent.
The Advent fasts which formerly existed among us in some places are abolished. - Cf. Can. 6, 1244.
Abstinence and fasting are commanded on Ash Wednesday, on Fridays and Saturdays of Lent, and on Ember days, on the vigils of Pentecost, of the Mother of God assumed into heaven, of All Saints, and of the Nativity of the Lord. On these days meat and broth from meat, and more than one eating, are forbidden; in this meal, with meat and broth from meat excluded, any other foods are permitted; the morning and evening little refections are also conceded, in which the quantity and quality are to be determined according to approved custom.
Finally, the days on which the law of abstinence, the law of abstinence and fasting, or the law of fasting only ceases are determined; these are Sundays or feast days of precept, except for a feast in the time of Lent. In the future vigils are not anticipated, and thus the very obligation of fasting and abstinence falls. Moreover, from noon of Holy Saturday the faithful are bound by neither the law of fasting nor of abstinence.1