From the Liturgical Note to the Proper of the Saints:
It should be noted that some Feasts not in the Universal Kalendar are commonly kept by Anglicans, and herein these have their dated bracketed, as for example, St. David, thus: [March Ist]: which method is also followed as to the ranking of the Feasts of St. Paul’s Conversion and of St. Barnabas, which by Common Anglican custom are kept as II Class Doubles, and not as Greater Doubles. (In the Supplement to this Breviary, provision is made for a large number of Feasts observed in certain places, such as Prayer-Book Black Letter Days).
The Anglican Breviary, The Proper of the Saints, p. E1.
In practice that means today, Monday the Ist of March is not observed as a Greater, non-priviliged Feria (see Anglican Breviary, the Table on p. xliv) but as a Lesser Double for St. David. The propers for St. David (p. E107) give the following guidance for keeping this Feast:
(For this monastic-bishop, Common 10 is appropriate.)
If in Lent a Commem. of Feria is made at both Vespers and at Lauds.
Matins by Rule 2 in Lent, otherwise by Rule 1.
Here, again, the Anglican identity of the Anglican Breviary is underlined by its editors and again full provision is given to keep all Black Letter Days and Feasts celebrated in the Global Communion. Since the Anglican Breviary is an old book, this Kalendar of Anglican Feasts is in need of updating to make it conform to the Kalendars in use today. Perhaps some day that will happen, but I will not attempt it here. I wish to emphasize here that the Anglican Breviary is not at cross purposes with the Book of Common Prayer, but in fact is essentially shaped by the Book of Common Prayer – in a sense the Anglican Breviary is an abbreviated* Book of Common Prayer minus the Ordinary and Propers for the Mass or Holy Communion etc.
To celebrate St. David on a Lenten Feria:
Both Vespers: Psalms + Antiphons (doubled) of Feria, Chapter, Hymn & Ant. on Magn. from Common 10, Collect from Proper, Commem. of Feria.
Matins: by Rule 2, Inv., Antiphon & Hymn from Common 10, Psalms + Antiphons (doubled) of Feria, Lesson I is Scripture from Common 10, Lesson II is the Legend from the Proper, Lesson III is Gospel + Homily from Feria (responds from I and II from Common 10) followed by Te Deum.
Lauds: according to Lauds I, Psalms + Antiphons (doubled) from Feria, Chapter, Hymn & Ant. on Ben., from Common 10, Collect from Proper, Commem., of Feria.
Hours: Psalms + Antiphons (never doubled) from Feria, Chapter from Common 10, Collect fromProper.
Fr. Gregory Wassen +
* What I mean is that the Anglican Breviary corresponds to the Daily Office of the BCP but does not contain an Ordinal, Pastoral Services, Historical Formularies etc. So that even for the AB the BCP remains a necessary point of reference. The AB is therefore a more elaborate Daily Office; the AB reforms the Secular (Roman) Breviary after the pattern of the BCP – conforms the former to the BCP. There is therefore an essential continuity of identity between the BCP and the AB which pivots on the BCP.