A reader writes:
I am currently involved in a group studying ECCLESIA DE EUCHARISTIA. Two questions came up last night.
1) Can you go to two masses on the same day and receive communion at both?
I realize that you can receive two times as long as the second one is a mass, (the first could be a communion service..etc). But one of the participants really insisted that it couldn’t be two masses for the same day (like a 9:00 and an 11:00) service on Sunday.
Your friend is incorrect on this point. First, here is what the Code says as a general matter about receiving Communion:
Can. 912 Any baptized person not prohibited by law
can and must be admitted to holy communion.
This means that unless there is a specific prohibition in the law that would prevent a person from receiving at two Masses then the person is allowed to receive at two Masses.
Now, there are only two canons that deal with how often a layperson can receive Communion in a single day. One of them deals with Viaticum in case of death. Here’s the other:
Can. 917 A person who has already received the
Most Holy Eucharist can receive it a second time on the same day only within
the eucharistic celebration in which the person participates, without prejudice
to the prescript of can. 921, §2.
Canon 921, §2 deals with Viaticum, so it doesn’t apply to the situation you are asking about.
As you can see, this canon says that a person can receive Communion "a second time on the same day only within
the eucharistic celebration in which the person participates." This specifies the circumstances that must apply to the second time a person receives Communion but says nothing about the circumstances of the first time. Since there are no requirements in the law dealing with the first time one receives Communion, canon 912 applies, and so one can receive Communion at Mass both the first time one receives it in a day and the second time. In fact, it is required that one receive it at Mass the second time (per canon 917). Whether it is at a Mass or a Communion service the first time is a matter the law allows liberty on.
One thus could go to a 9 a.m. Mass and receive Communion and then go to an 11 a.m. Mass and receive again. What the law prohibits is going to more Masses than this per day and receiving Communion at each of them.
The reader continues:
2) How many masses can a priest say a day? I believe that He is encouraged to say at least one mass a day but what is the upper limit.
Here’s the regs on that:
Can. 905 §1. A priest is not permitted to
celebrate the Eucharist more than once a day except in cases where the law
permits him to celebrate or concelebrate more than once on the same day.§2. If there is a shortage of priests, the local
ordinary can allow priests to celebrate twice a day for a just cause, or if
pastoral necessity requires it, even three times on Sundays and holy days of
obligation.
The typical cap is thus once per day unless the bishop allows him to say two or three Masses for pastoral reasons (three being allowed on Sundays and holy days). These latter practices are known as "binating" and "trinating," respectively.
(NOTE: The green CLSA commentary on the Code notes that there are particular circumstances in which additional Masses could be said, but that’s the general rule. There are also certain liturgical days in which multiple Masses are allowed by the law itself and so per §1 the permission of the bishop would not be needed to cover those days.)



