During Lent the Bread must not be offered except on the Sabbath Day and on the Lord's Day only.
Notes.
Ancient Epitome of Canon XLIX.
In Lent the offering should be made only on the Sabbath and on the Lord's day.
Hefele.
This canon, which was repeated by the Trullan Synod in its fifty-second canon, orders that on ordinary week days during Lent, only a Missa Praesanctificatorum should take place, as is still the custom with the Greeks on all days of penitence and mourning, when it appears to them unsuitable to have the full liturgy, and as Leo Allatius says, for this reason, that the consecration is a joyful act. A comparison of the above sixteenth canon, however, shows that Saturday was a special exception.
To the Saturdays and Sundays mentioned by Hefele must be added the feast of the Annunciation, which is always solemnized with a full celebration of the Liturgy, even when it falls upon Good Friday.
Canon L.
The fast must not be broken on the fifth day of the last week in Lent [i.e., on Maunday Thursday], and the whole of Lent be dishonoured; but it is necessary to fast during all the Lenten season by eating only dry meats.