Last Saturday was the Feast of the Immaculate Conception, right?
Have you attended Mass?
In the morning or at night?
When you attended it at night, was the Mass for the Immaculate Conception or the Anticipated Mass for the 2nd Sunday of Advent?
If the Mass last Saturday night was for the Immaculate Conception, then you have fulfilled your obligation for the Immaculate Conception. But you did not fulfill your obligation for the Second Sunday of Advent.
You had better attended either an anticipated Mass or went to Mass yesterday.
That is the opinion of the "Supreme Court of the Church Chief Justice" my fave cardinal, Leo Raymund Cardinal Burke, said in a post from Fr. Z, about the conversion a priesf-friend of his had with the cardinal.
Honestly, I do side with Cardinal Burke on this one. Same Mass different liturgies like attending a Funeral Mass. You cannot possibly say that it is the same as that of fulfilling your Sunday obligation when you attended a Funeral Mass done on a Sunday.
Different readings, different hymns, different intentions.
I remember Cardinal Rosales issuing a pastoral directive saying that you fulfill your Sunday obligation with your Immaculate Conception obligation when you attend the same Mass. Actually I found it weird the first time and I still find it weird. The Mass is the Mass, right I get it. But the readings and the liturgy for a specific Mass is different from another Mass. The Mass for the Feast of the Immaculate Conception has a different tone than the one for the Second Sunday of Advent.
We had this discussion with our parish priest and the know-it-all Worship Ministry who got their uhm training in MST. They said the same thing as what Cardinal Rosales mentioned. One Mass fulfills both obligations.
Then what is the need for different readings, for different liturgical colors?
See my point?
Now, share what you did last Saturday and if you thought of attending just one Mass to fulfill both obligations.