[quote="JM3, post:3, topic:224346"]
1438 The seasons and days of penance in the course of the liturgical year (Lent, and each Friday in memory of the death of the Lord) are intense moments of the Church's penitential practice.36 These times are particularly appropriate for spiritual exercises, penitential liturgies, pilgrimages as signs of penance, voluntary self-denial such as fasting and almsgiving, and fraternal sharing (charitable and missionary works).
Code of Canon Law
Can. 1250 The penitential days and times in the universal Church are every Friday of the whole year and the season of Lent.
But also (my emphasis):
"Abstinence from meat, or from some other food as determined by the Episcopal Conference, is to be observed on all Fridays, **unless* a solemnity should fall on a Friday. Abstinence and fasting are to be observed on Ash Wednesday and Good Friday."* (me: though I'm sure one can choose to abstain, it just appears it is not bound "to be observed" if its a Friday and a Solemnity).
" The conference of bishops can determine more precisely the observance of fast and abstinence as well as substitute other forms of penance, especially works of charity and exercises of piety, in whole or in part, for abstinence and fast."