[Rationale divinorum officiorum]

On Rogation Sunday and the Rogations. .clxvj.
On the vigil of the Ascension. .clxvij.
On the feast of the Ascension. .clxvj.
On the Sunday after the Ascension. .clxviij.
On the vigil of Pentecost. .clxix.
On the holy day of Pentecost. .clxx.
On Monday and Tuesday of Pentecost. .clxxij.
On Wednesday, Friday, and Saturday of Pentecost. .clxxij.
On the octave of Pentecost. .clxxiij.
On the first Sunday after Pentecost. .clxxiij.
On the second, third, fourth, fifth, and sixth Sundays after Pentecost. .clxxiiij.
On the seventh, eighth, ninth, tenth, and eleventh Sundays after Pentecost. .clxxv.
On the twelfth, thirteenth, fourteenth, fifteenth, and sixteenth Sundays after Pentecost. .clxxvj.
On the seventeenth, eighteenth, and nineteenth Sundays after Pentecost. .clxxvij.
On the Angaria a liturgical or seasonal term possibly referring to a specific fast or duty. .clxxvij.
On the twentieth, twenty-first, and twenty-second Sundays after Pentecost. .clxxviij.
On the twenty-third, twenty-fourth, and twenty-fifth Sundays after Pentecost. .clxxix.
On the twenty-sixth Sunday after Pentecost. .clxxx.
On nocturnal lessons. .clxxx.
The seventh book has forty-two chapters.
On the feasts of the saints. .clxxxj.
On Saints Fabian and Sebastian. .clxxxij.
On the feast of Saint Agnes. .clxxxiij.
On the conversion of Saint Paul. .clxxxiij.
On Saint Julian. .clxxxiiij.
On Saint Agatha. .clxxxiiij.
On the Purification of the Blessed Virgin Mary. .clxxxv.
On the Chair of Saint Peter. .clxxxv.
On the Annunciation of the Blessed Virgin Mary. .clxxxvj.
On the Apostles Philip and James. .clxxxvij.
On the Invention of the Holy Cross. .clxxxvij.
On the Veiling likely referring to the feast of St. Michael of Saint Michael. .clxxxvij.
On Gervasius and Protasius. .clxxxviij.
On Saint John the Baptist. .clxxxix.
On the Apostles Peter and Paul. .clxxxix.
On Mary Magdalene. .clxxxxij.
On the seven brothers. .clxxxxij.
On the feast of the Apostle James. .clxxxxiij.
On the seven sleepers. .clxxxxiij.
On the feast of the Blessed Peter in Chains. .clxxxxij.
On the feast of the Maccabees. .clxxxxiiij.
On the Invention of Saint Stephen. .clxxxxv.
On the Transfiguration of the Lord. .clxxxxv.
On the feast of Saint Lawrence. .clxxxxvj.
On the Assumption of the Blessed Virgin Mary. .clxxxxvij.
On Saint Bartholomew. .clxxxxvij.
On the feast of the Decollation of Saint John. .clxxxxviij.
On Felix and Adauctus. .clxxxxix.
On the Nativity of the Blessed Virgin Mary. .clxxxxix.
On the Exaltation of the Holy Cross. .ccj.
On the Apostle Matthew. .ccj.
On Saint Maurice. .ccij.
On the feast of Luke the Evangelist. .ccij.
On Simon and Jude. .ccij.
On the feast of All Saints. .ccij.

On the office of the dead. .ccij.
On the four crowned martyrs. .ccij.
On the Blessed Martin. .cciiij.
On the Apostle Andrew. .cciiij.
On Saint Nicholas the Bishop. .cciiij.
On the venerable Bede. .ccv.
On the Apostle Thomas. .ccv.
On the saints within the feast of the Lord. .ccv.
On the apostles in common. .ccvj.
On the evangelists. .ccvj.
On the martyrs. .ccvj.
On confessors and virgins. .ccvij.
On the feast of the dedication of the church. .ccvij.
The eighth book has two parts.
The first part of the eighth book has four parts.
On the year. On the beginning of the year. .ccix.
On the manifold year. .ccix.
On the twelve signs. On the leap year. .ccx.
On the four seasons of the year and their fasts. .ccx.
On solstices and equinoxes. .ccxj.
On the great year. .ccxj.
On the era. On the Olympiad. .ccxj.
On the lustrum. On the age. .ccxj.
On the century and the eon. .ccxij.
The second part of the first section has six parts.
On the month. On the calends. .ccxij.
On the nones. On the ides. .ccxiij.
Whence and why days are named. .ccxiij.
On the Egyptian days and the canicular days. .ccxiij.
The third part of the first section has four parts.
On the week and the calendar list. .ccxiij.
On solar regulars. .ccxiiij.
On the concurrents. .ccxiiij.
On the indiction. .ccxiiij.
The fourth part of the first section of the eighth book has three species.
On the day. On the moment. .ccxiiij.
On the hour. .ccxv.
The second part of the eighth book has seven species.
On the lunar year. .ccxv.
On lunar regulars. .ccxv.
On the epacts. On the embolism. .ccxvj.
On the golden number. .ccxvj.
On the Paschal term. .ccxvj.
On cycles, what they are and how many there are. .ccxvj.
On the final conclusion of this book. .ccxv.