Canon 29 No breaking the Lenten fast on Holy Thursday

The canon of those in Carthage declares that the holy things of the altar are not to be performed except by fasting men, one day of the year being excepted, on which the Lord's Supper is celebrated; those divine Fathers having perhaps used such oikonomia at that time on account of certain local reasons profitable to the Church. Since, therefore, nothing induces us to abandon akribeia, we decree, following the apostolic and patristic traditions, that it is not right in Lent, in the last week, to break the fast on the fifth day, and so to dishonour the whole of Lent.