A reader writes:
Just a quick question. December 25, 2006 falls on a Monday and
it’s a holy day of obligation. If a person normally goes to Sunday
mass at 5 pm, will he fulfill his Sunday obligation on Dec 24, 2006 and
at the same time fulfill the Christmas Day obligation (being that it
will be the Christmas vigil mass at 5 pm Sunday)? Or does he have to
go to an early Sunday mass (before the Christmas vigil) to fulfill his
Sunday obligation (and of course go to another mass for Christmas)?On a related note, if a person goes to a funeral or wedding mass on a Sunday, does this fulfill his Sunday obligation?
According to the Code of Canon Law,
Can. 1248 ยง1. A person who assists at a Mass celebrated
anywhere in a Catholic rite either on the feast day itself or in the evening of
the preceding day satisfies the obligation of participating in the Mass.
I’ve put two phrases in this in color. Given the way the red one is phrased, the law would appear to allow one to go to one Mass on Sunday evening (and after 5 p.m. would certainly count as evening, though some earlier masses might count as well) and simultaneously fulfill one’s Sunday obligation and the obligation of a holy day that falls on Monday.
But the law doesn’t mean that.
This isn’t clear from the text of the law itself, unfortunately. This is one of the areas where we bump up against the fact that Italy is a high-context culture that doesn’t write the law in the level of detail that would be expected in English- or German-speaking cultures, because it is assumed that you already know the answer to certain questions and thus they don’t need to be written down.
This is one of those questions: It is expected that everybody knows that if Christmas falls on a Monday then you have to go to Mass twice. You can’t just go to one. This is the common and constant opinion of learned persons, and so it’s what the law means even though it’s not what the law says. The Code provides:
Can. 19 If a custom or an express prescript of universal or particular law is lacking in a certain matter, a case, unless it is penal, must be resolved in light of laws issued in similar matters, general principles of law applied with canonical equity, the jurisprudence and practice of the Roman Curia, and the common and constant opinion of learned persons.
This canon applies to the situation of how to apply canon 1248 when it comes to the question of fulfilling two Mass obligations by attending a single Mass. We don’t have anything from Rome saying that you can do this, and "the common and constant opinion of learned persons" is that you can’t, so you can’t.
I find it frustrating that the law isn’t written with the level of specificity that makes this clear, but then I don’t get to write the law.
You’ve therefore got several options for how to fulfill your Sunday and Christmas obligations this year:
1) Go to a Saturday evening Mass (Sunday obligation) and a Sunday evening Mass (Christmas obligation)
2) Go to a Saturday evening Mass (Sunday obligation) and a Monday Mass (Christmas obligation)
3) Go to a Sunday Mass (Sunday obligation) and a Sunday evening Mass (Christmas obligation)
4) Go to a Sunday Mass (Sunday obligation) and a Monday Mass (Christmas obligation)
5) Go to one Sunday evening Mass (Sunday obligation) and a second Sunday evening Mass (Christmas obligation)
Now, beyond that, it doesn’t matter what kind of Mass it is you are attending. It can be a wedding Mass or a funeral Mass. It also doesn’t have to be a specifically Christmas vigil Mass to fulfill one’s Christmas obligation. It just has to be a Mass occurring on Sunday evening or Monday.
This is often surprising to people because there is an assumption out there that you need to hear a particular set of readings (i.e., the readings for that Sunday or readings for Christmas) in order to fulfill a Mass obligation, but this is not true, and this time the law makes it clear. That’s why I put the phrase "anywhere in a Catholic rite" in blue in canon 1248. This makes it clear that you don’t have to attend a Latin rite Mass to fulfill a Mass obligation, and this means that you don’t have to hear any particular set of readings to fulfill your obligation. Different rites use different readings, and in many cases, the different rites will not even be celebrating the same holy day and won’t have any special readings.
The issue of what readings you hear is thus irrelevant to your fulfillment of your obligation to participate in Mass.
But you do gotta go to Mass twice this weekend, once to celebrate Our Lord’s Resurrection and one to celebrate his Birth.

