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Pope Saint Paul VI (3 April 1969): “Although the text of the Roman Gradual—at least that which concerns the singing—has not been changed, the Entrance antiphons and Communions antiphons have been revised for Masses without singing.”

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Views from the Choir Loft

“Simultaneous Fulfillment” of Mass Obligation?

Jeff Ostrowski · November 24, 2017

3830 Calendar CCORDING to current USA law, a Catholic may fulfill the Sunday obligation by attending Mass on Saturday evening, sometimes called an “anticipated” or “vigil” Mass. The readings and propers chosen for Saturday night make no difference. (The same holds true for any Holy Day of Obligation.)

Christmas falls on a Monday in 2017.

Can you “double dip” the fulfillment of your Mass obligation? In other words, does attending Mass on Sunday evening fulfill both the Sunday and Monday obligations? Reading the Code of Canon Law, we might erroneously believe this:

Can 1248 • 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.

For years, this has caused tremendous confusion online. Many authors feel we must attend Mass twice but struggle to provide documentation. Some appeal to “the common and constant opinion of learned persons” argument. But the Congregation for the Clergy has already clarified the matter of simultaneous fulfillment by the faithful:

328 simulatneous-fulfillment-mass-obligation DOUBLE DIPPING

    * * Source • USCCB Document on “Double-Dipping” (1974)


I’m not a canon lawyer, but this document seems to leave no room for “double dipping” (as Andrew Motyka dubbed it several years ago). Therefore, you must attend Mass twice—once for Sunday, once for Christmas—but there are many ways this can lawfully be done. You could go Saturday night and Monday night. Or you could go Sunday evening and Christmas morning. My personal preference is to go Sunday morning and Monday morning.

For the record, rules like these apply to the Extraordinary Form as well. (Similar to how EF Catholics are bound by the current laws on fasting and not, say, the 1950s regulations.)

HIS DUBIUM was answered at the precise moment we would expect. After all, “anticipated fulfillment” of Mass obligation was a new concept, and (to be brutally honest) ruptured the traditional practice of the Church, which had always celebrated vigils on the preceding morning. It should be noted—and cannot be repeated enough—that the choice of formularies makes no difference when it comes to fulfilling one’s obligation to attend Mass. As the above document points out:

On the evening of the Fourth Sunday of Advent, when this falls on December 24, it is possible to have both the evening Mass of the Sunday and the vigil Mass of Christmas. In the same way, when Christmas occurs on a Saturday, the evening Mass might be either that of Christmas or the anticipated Mass for the Feast of the Holy Family.

That is why one can attend a Wedding (“Nuptial Mass”) on Saturday evening and fulfill one’s Sunday obligation, although I believe such a Mass cannot begin too early in the afternoon.


Fun fact : Archbishop Bugnini, in that 1974 document, clearly says nobody can be forced to receive Holy Communion in the hand:

Furthermore, even when an Episcopal Conference petitions the Holy See for the faculty to distribute communion in the hand (see Memoriale Domini, May 29, 1969), this manner of reception can in no way be imposed on the faithful. Rather, the freedom and possibility of receiving communion in the traditional manner must always be granted.

It was recently clarified by the USCCB that kneeling of Communion cannot be denied.

The following are offered for your consideration:

    * *  PDF Download • Diocese of Tulsa, Oklahoma

    * *  PDF Download • Archdiocese of Atlanta, Georgia

    * *  PDF Download • Diocese of Birmingham, Alabama

    * *  PDF Download • USCCB Statement on “Double Dipping”

    * *  PDF • “Evening Masses and Days of Obligation” (58 pages)

Opinions by blog authors do not necessarily represent the views of Corpus Christi Watershed.

Filed Under: Articles Tagged With: anticipated Mass, simultaneous Mass obligation, vigil Mass Last Updated: January 1, 2020

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About Jeff Ostrowski

Jeff Ostrowski holds his B.M. in Music Theory from the University of Kansas (2004). He resides with his wife and children in Michigan. —(Read full biography).

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Corpus Christi Watershed

President’s Corner

    Responsorial Psalm Fauxbourdon?
    When it comes to singing Responsorial Psalms in Fauxbourdon, what does this sound like in practice? Can such a thing be done successfully with volunteer choirs in real Catholic parishes? Listen to this audio excerpt from Good Friday and see what you think. Our parish volunteer choir did so well this year—and the ceremonies were ‘standing room only’. For the record, that musical score can be downloaded (completely free of charge) from the flourishing feasts website.
    —Jeff Ostrowski
    Music List • (Easter Sunday, 2026)
    Readers have expressed interest in seeing the ORDER OF MUSIC I created for Easter Sunday—a.k.a. “Ad Missam in die Paschae”—which is 5 April 2026. Please feel free to download it as a PDF file if such a thing interests you. The Fauxbourdon for Communion is particularly moving.
    —Jeff Ostrowski
    PDF Download • “Sprinkling Rite”
    Liturgical reformers who gained power after Vatican II frequently caused great suffering to musicians. With the stroke of a pen, they sometimes make changes that would require thousands—or even millions—of man hours (work undertaken by composers and editors). The Sprinkling Rite during Eastertide is but one tiny example. The version given in that PDF document was the original melody for Roman Missal, Third Edition. Some still prefer that version. However, at the last moment, an “unknown hand” tinkered with a few notes in the antiphon. Those who examine the current edition can verify this with their own eyes.
    —Jeff Ostrowski

Quick Thoughts

    PDF • “Liturgical Law” (467 Pages)
    On Good Friday during the middle ages, the pope privately recited THE ENTIRE PSALTER. If you don’t believe me, see for yourself by reading this passage by Dom Charles Augustine Bachofen (d. 1943). His famous book—called “Liturgical Law: A Handbook Of The Roman Liturgy”—was published by the Benjamin Herder Book Company, which was the American arm (operating out of St. Louis, Missouri) of one of the world’s most significant Catholic publishers. Dom Charles Augustine Bachofen was born in Switzerland but spent his career between the Benedictine monasteries at Conception (Missouri) and Mount Angel (Oregon). His 1931 masterpiece, Liturgical Law can be downloaded as a PDF file … 467 pages!
    —Jeff Ostrowski
    “Gregorian Chant Quiz” • 24 March 2026
    How well do you know your Gregorian hymns? Do you recognize the tune inserted into the bass line on this score? For many years, we sang the entire Mass in Gregorian chant—and I mean everything. As a result, it would be difficult to find a Gregorian hymn I don’t recognize instantly. Only decades later did I realize (with sadness) that this skill cannot be ‘monetized’… This particular melody is used for a very famous Gregorian hymn, printed in the LIBER USUALIS. Do you recognize it? Send me an email with the correct words, and I promise to tell everybody I meet about your prowess!
    —Jeff Ostrowski
    PDF Download • “Ubi Caritas” (SATB)
    I remember singing “Ubi Cáritas” by Maurice Duruflé at the conservatory. I was deeply moved by it. However, some feel Duruflé’s version isn’t suitable for small choirs since it’s written for 6 voices and the bass tessitura is quite low. That’s why I was absolutely thrilled to discover this “Ubi cáritas” (SATB) for smaller choirs by Énemond Moreau, who studied with OSCAR DEPUYDT (d. 1925), an orphan who became a towering figure of Catholic music. Depuydt’s students include: Flor Peeters (d. 1986); Monsignor Jules Van Nuffel (d. 1953); Arthur Meulemans (d. 1966); Monsignor Jules Vyverman (d. 1989); and Gustaaf Nees (d. 1965). Rehearsal videos for each individual voice await you at #19705. When I came across the astonishing English translation for “Ubi Cáritas” by Monsignor Ronald Knox—matching the Latin’s meter—I decided to add those lyrics as an option (for churches which have banned Latin). My wife and I made this recording to give you some idea how it sounds.
    —Jeff Ostrowski

Random Quote

Why do we never sing “De Spiritu Sancto” (St. Athenogenes) in our churches? There are a dozen translations in English verse. Where could anyone find a better evening hymn than this, coming right down from the catacombs? Our hymnbooks know nothing of such a treasure as this, and give us pages of poor sentiment in doggerel lines by some tenth-rate modern versifier.

— Rev’d Adrian Fortescue (d. 1923)

Recent Posts

  • PDF Download • “Catholic Hymnal & Service Book” (632 Pages)
  • PDF • “Liturgical Law” (467 Pages)
  • Gregorian Chant … with Organ Accompaniment?
  • Responsorial Psalm Fauxbourdon?
  • Music List • (Easter Sunday, 2026)

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