At the urging of Ttony, I persist with my attempt at an ordo for the Use of Nidaros. If you are a sixteenth-century cleric incardinated into one of the Nidrosian sees, I strongly advise you to check with your bishop before accepting the accuracy of anything I post here!
Sunday 21 December. FOURTH SUNDAY OF ADVENT. Anthem: O virgo virginum.
Monday 22. ST THOMAS, apostle, double. O virgo virginum.
Tuesday 23. St Thorlac, bishop and confessor, simple. O virgo virginum.
Wednesday 24. Vigil of the Nativity. Nesciens mater.
Thursday 25. NATIVITY OF THE LORD, summum. Commemoration of St Anastasia, virgin martyr, at the second Mass. Nesciens mater.
Friday 26. ST STEPHEN, prothomartyr [sic], greater double. Com. of the Octave of the Nativity. Nesciens mater.
Saturday 27. ST JOHN, apostle and evangelist, greater double. Comm. Octt. Nat. & Steph. Nesciens mater.
'Doubting' Thomas is displaced by the Sunday from his usual day. Music from the office of St Thorlac is presented on the new CD Aquilonis by Norway's Trio Medieval. This is not it, but it will give you an idea of how good they are: