What Mass does MHFM accept?

We accept the Mass of Pope St. Pius V; we don’t approve of the invalid Novus Ordo, of course, and we don’t approve of the use of the 1962 Missal, the Mass of John XXIII – which is the same as the Mass of St. Pius V but with St. Joseph’s name illegally added to the Canon (as well as some other minor changes). We acknowledge that the 1962 Missal is valid, since the addition of St. Joseph to the Canon has no bearing on validity, only legality. We also believe that in this time of crisis one can attend a Mass celebrated by a validly ordained priest who uses the 1962 Missal, as long as the person does not agree with or support the priest. Here is an interesting quote relating to this issue:

“In order to further the liturgical reform that Hebblethwaite [John XXIII’s biographer] claimed John ‘favored,’ the Pope ‘added to the Roman Canon the name of St. Joseph – beati Joseph, eiusdem Virginis Sponsi – a pious ruse to show that the text was not immutable [unchangeable],’ according to Hebblethwaite.” (Mark Fellows, Fatima in Twilight, p. 177)

In other words, according to John XXIII’s biographer, the whole reason for John XXIII to add St. Joseph’s name to the Canon was to show the Canon was not unchangeable and to pave the way for what later came with Antipope Paul VI – the New Mass.