Today is the ninth Sunday after Pentecost and the first Sunday of August. It is of semi-double rite. The first Sunday of August is the Sunday closest to the Kalends of August. If, for example, August 1st were a Monday the first Sunday would actually be on July 31st. In the Breviarium Romanum the collects and third nocturn lessons for the VII Sunday and following Sundays are given after the lessons for the fifth week of August.
At Vespers yesterday commemorations were sung of St. Peter's Chains, St. Paul, St. Alphonsus de Liguori and St. Stephen I.
At Mattins in the first nocturn the lessons are the Incipit, or beginning, of the Proverbs of Solomon with their responsories, not the lessons given for the IX Sunday. In the Breviary these texts for the first Sunday of August are printed after the 11th week of Pentecost. The reason for this is that the time after Pentecost can be either shorter or longer depending on the date of Easter. In the second nocturn the lessons are from a treatise of St. Ambrose on Psalm 118 - the 'psalm of the Law'. In the third nocturn the lessons are a homily of St. Gregory and the responsories are Domine, pater etc those given for the 1st to 3rd Sundays of August. These, as noted above, can be found in the section of the Breviary after the fifth week of August.
At Lauds commemorations are sung of St. Alphonsus and St. Stephen. At Prime Quicumque and the Dominical preces are omitted because of the occuring double feast.
Mass follows Terce. The Gloria is sung, the second collect is of St. Alphonsus, the third collect of St. Stephen. The Creed is sung and the preface that of Sunday.
At Vespers commemorations are sung of the following feast of the Finding of the Body of St. Stephen and St. Alphonsus.
In the 'liturgical books of 1962' the Feast of St. Peter's Chains is abolished so no commemoration of that, or anything else, at Vespers. Mattins is chopped down to one nocturn of three lessons. St. Alphonsus and St. Stephen are not commemorated at Lauds or Mass. At second Vespers there is no commemoration of the Finding of the Body of St. Stephen - that feast has been abolished too.