From a reader:
Is it permissible to have a Extraordinary Form Vigil Mass on a Saturday evening?
Yes, I believe it is. I believe so… again… I believe so.
Permission to say Holy Mass in the evening was granted before the 1962 Missale Romanum was issued. The older Code of Canon Law, of 1917, said that Mass could not begin more than one hour after noon (without distinction of solar time or civil time). But that was not something of the rubrics found in the Missale Romanum. The time of Mass, other than in the case of the Vigil of Easter and, perhaps, the Masses of Christmas, isn’t given much attention in the Missale Romanum.
Also, one fulfills one’s obligation by attending Mass on the day of precept itself or on its vigil.
Therefore, were one to attend Holy Mass on a, say, Saturday afternoon, that would fulfill the obligation regardless of the texts used for Mass. If the Mass was of the Saturday, one’s Sunday obligation would nevertheless be fulfilled.
That brings up the thornier question – and I think this is probably what you were really asking – of whether the Sunday texts can be used Saturday afternoon.
While I am unaware that the Pontifical Commission “Ecclesia Dei” has yet ruled on this, I suspect… suspect, mind you, that – with the permission of the Commission – it would be permissible to use the Sunday texts on a Saturday afternoon, since the liturgical day can be reckoned to begin on the afternoon before the feast or Sunday. I wouldn’t do it on my own.
I have little doubt that all sorts of people are ready to jump in now.