Much discussion has arisen concerning which Mass is to be celebrated on December 28, 2008. "This is the Feast of the Holy Innocents; but should we, perhaps, celebrate the Sunday after Christmas instead?"
In the pre-Vatican II missal, the Mass for Sunday within the Octave of Christmas (Sunday after Christmas, if you will), is to be celebrated on December 30th no matter what day of the week this falls on, should Christmas or any of the three days following fall on a Sunday. In the event that either Dec. 29th or Dec. 31st should fall on a Sunday, the Mass to be said on Dec. 30 is that of the Octave of the Nativity which is the same as the Third Mass of Christmas. The Epistle and Gospel, however, are to be taken from the Second Mass of Christmas. Dec. 30 is the only ferial day in the old calendar. Dec. 29 is St. Thomas of Canterbury, and Dec. 31 is St. Sylvester.
Then come the question of what to do for the Second Sunday after Christmas? You may follow this discussion at Gottesdienst Online. (Dec. 12 - What to do with Sundays after Christmas?)
According to the pre-Vatican II missals, the solution to this problem is easily solved. The propers assigned to the Second Sunday after Chrstmas are traditionally those of the Vigil of the Epiphany. TLH actually uses (most of) these propers for the Sunday after Christmas.
Introit: When all was still and it was midnight.... (TLH - Sunday after Christmas, second place.)
Collect: Almighty and everlasting God, direct our actions according to Thy good pleasure.... (TLH - Sunday after Christmas.)
Epistle: Gal 4:1-7 (TLH - Sunday after Christmas)
Gradual: Thou art fairer than the children of men.... (TLH - Sunday after Christmas.)
Gospel: Matt 2:19-23 (TLH - Sunday after New Year, TLH beginning at v. 13.)
This solution is in agreement with the historic use and the TLH propers.