Nidaros ordo

Sunday 6 September. Fourteenth Sunday after Trinity. Anthem after Compline: Ave regina celorum.
Monday 7. Feria II. (The office of St Adrian is celebrated today by anticipation.) Sub tuum presidium.
Tuesday 8. NATIVITY OF THE VIRGIN MARY, double (?). St Adrian, bishop and martyr, three lessons (see yesterday's entry). O florens rosa.
Wednesday 9. Feria IV in the Octave of the Nativity of the Virgin Mary. Commemoration of St Gorgon, martyr. Rogamus te.
Thursday 10. Feria V in Oct. Nat. Mar. Com. St Audomarus, bishop. Ave stella matutina.
Friday 11. Feria VI in Oct. Nat. Mar. Com. Ss Prothus and Iacinctus, martyrs. Mundi domina.
Saturday 12. Sabbath in Oct. Nat. Mar. Salve regina.

With St Adrian and the Nativity of the Blessed Virgin Mary, we have a situation similar to that involving Ss Hermes and Augustine a couple of weeks ago: an annual clash of celebrations. Here the same solution has been arrived at - to anticipate the lesser feast on the previous day, which happens to be vacant - but here the transfer has not gone as far as changing the date of Adrian's feast day. Instead, we have a rubric on the 7 September: Hic cantentur de eo iii. lc. noct. (Here the three matins lessons about him are sung.) All this doesn't leave the kalendarist enough room to give us the rank of Mary's feast, but as it is printed in red and has an octave, we can assume it is at least a double feast.

The Nativity of the Virgin is one of those offices which survives in the Choir Antiphoner of Nidaros Cathedral, and it has been recorded by the Schola Sanctae Sunnivae.