Calendars continue to trouble me in this little utraquist church iuxta ferriviam Oxoniensium. I know that PCED has said we have to use the EF calendar with the EF and the OF calendar withthe OF. So this morning I included in my EF Mass commem and Last Gospel of the Vigil of S Matthias. But tomorrow, when the Mass is OF (in our own S Thomas's version of the OF in Cranmer's English and with unreformed ritual), I shall not be keeping S Matthias.
Perhaps I should in clarification add that I follow the St Lawrence Press ORDO.