ChapterII-VII. Combining the Hours With Mass or With Each Other
93. In particular cases, if circumstances require, it is possible to link an hour more closely with Mass when there is a celebration of the liturgy of the hours in public or in common, according to the norms that follow, provided the Mass and the hour belong to one and the same office. Care must be taken, however, that this does not result in harm to pastoral work, especially on Sundays.
94. When morning prayer, celebrated in choir or in common, comes immediately before Mass, the whole celebration may begin either with the introductory verse and hymn of morning prayer, especially on weekdays, or with the entrance song, procession, and celebrant's greeting, especially on Sundays and holydays; one of the introductory rites is thus omitted.
The psalmody of morning prayer follows as usual, up to, but excluding, the reading. After the psalmody the penitential rite is omitted and, as circumstances suggest, the Kyrie; the Gloria then follows, if required by the rubrics, and the celebrant says the opening prayer of the Mass. The liturgy of the word follows as usual.
The general intercessions are made in the place and form customary at Mass. But on weekdays, at Mass in the morning, the intercessions of morning prayer may replace the daily form of the general intercessions at Mass.
After the communion with its communion song the Canticle of Zechariah, Blessed be the Lord, with its antiphon from morning prayer, is sung. Then follow the prayer after communion and the rest as usual.
95. If public celebration of a daytime hour, whichever corresponds to the time of day, is immediately followed by Mass, the whole celebration may begin in the same way, either with the introductory verse and hymn for the hour, especially on weekdays, or with the entrance song, procession, and celebrant's greeting, especially on Sundays and holydays; one of the introductory rites is thus omitted.
The psalmody of the hour follows as usual up to, but excluding, the reading. After the psalmody the penitential rite is omitted and, as circumstances suggest, the Kyrie; the Gloria then follows, if required by the rubrics, and the celebrant says the opening prayer of the Mass.
96. Evening prayer, celebrated immediately before Mass, is joined to it in the same way as morning prayer. Evening prayer I of solemnities, Sundays, or feasts of the Lord falling on Sundays may not be celebrated until after Mass of the preceding day or Saturday.
97. When a daytime hour or evening prayer follows Mass, the Mass is celebrated in the usual way up to and including the prayer after communion.
When the prayer after communion has been said, the psalmody of the hour begins without introduction. At the daytime hour, after the psalmody the short reading is omitted and the prayer is said at once and the dismissal takes place as at
Mass. At evening prayer, after the psalmody the short reading is omitted and the Canticle of Mary with its antiphon follows at once; the intercessions and the Lord's Prayer are omitted; the concluding prayer follows, then the blessing of the congregation.
98. Apart from Christmas eve, the combining of Mass with the office of readings is normally excluded, since the Mass already has its own cycle of readings, to be kept distinct from any other. But if by way of exception, it should be necessary to join the two, then immediately after the second reading from the office, with its responsory, the rest is omitted and the Mass begins with the Gloria, if it is called for; otherwise the Mass begins with the opening prayer.
99. If the office of readings comes immediately before another hour of the office, then the appropriate hymn for that hour may be sung at the beginning of the office of readings. At the end of the office of readings the prayer and conclusion are omitted and in the hour following the introductory verse with the Glory to the Father is omitted.