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The feast of the Transfiguration of the LORD is a Double feast of the Second Class and its liturgical colour is white. The IX Sunday after Pentecost (and the second Sunday of August) is commemorated at in the Office and at Mass.
At first Vespers yesterday afternoon the antiphons
Assumpsit Jesus etc., proper to the feast, were sung, doubled, with psalms 109, 110, 111, 112 & 116. The Office hymn was
Quicumque Christum quaeritis. The antiphon on the
Magnificat was
Christus Jesus, splendor Patris etc and the collect was proper to the feast. After the collect of the feast commemorations were sung of the preceding Office of the Dedication of
Sancta Maria ad Nives and of the Sunday, the antiphon on the
Magnificat being
Ego in altissimis for the Saturday before the second Sunday of August. The Suffrage of the Saints was omitted as were the Dominical
preces at Compline. At Compline, and at all the Hours, the hymns have the Doxology
Jesu tibi Domine, Qui apparusti hodie etc along with its melody.
At Mattins the invitatory is
Summum Regem gloriae, Venite adoremus. The Office hymn is, again,
Quicumque Christum quaeritis. In the first nocturn the proper antiphons,
Paulo minus etc, are sung with psalms 8, 28 & 44. The lessons in the first nocturn are from the Second Epistle of St. Peter. In the second nocturn the antiphons
Illuminans etc are sung with psalms 75, 83, and 86. The lessons are from a sermon of St. Leo. In the third nocturn the antiphons
Thabor et Hermon etc are sung with psalms 88, 96 and 103. The homily in the third nocturn is taken from St. Chrysostom's 57th homily on St. Matthew's Gospel. The ninth lesson is of the Sunday. The
Te Deum is sung. The
Incipit of the Book of Ecclesiastes, from the second Sunday is transferred to tomorrow's first nocturn.
At Lauds the antiphons
Assumpsit Jesus Petrum et Jacobem etc are sung with the Dominical psalms. The Office hymn is
Lux alma, Jesu, mentium. The antiphon on the
Benedictus is
Et ecce vox etc. After the collect of the feast commemorations are sung of the Sunday and of SS Xystus & Companions. The Suffrage of the Saints is omitted.
At Prime and the Hours the hymns have the proper Doxology and melody as noted above. The antiphons from Lauds are sung at the Hours in the usual order. At Prime the festal psalms are sung (53, 118i & 118ii), the verse in the short response is
Qui apparuisti and the
lectio brevis is
Sustulit me.
Mass is sung after Terce. Where it is the custom a blessing of grapes takes place immediately before Mass. The introit is
Illuxerant. The
Gloria is sung, the second collect is of the Sunday, (in private Masses the third collect is of SS Xystus etc). The
Credo is sung, the Preface is of the Nativity and the last Gospel is of the Sunday.
At Vespers all is sung as was sung at first Vespers except for the antiphon on the
Magnificat,
Et audientes, which is proper to second Vespers. After the collect of the feast commemorations are sung of the following Office of St. Cajetan and of the Sunday. At Compline the Dominical
preces are omitted.
In the 'liturgical books of 1962' today would be the first Sunday of August but it is entirely omitted and not commemorated in the Office or Mass of the feast. At Vespers there are no commemorations. At Mattins Psalm 88 ends with the verse
Quia Domini est assumptio nosta etc and the verses from
Tunc locutus es etc to the end, 34 verses in all, are omitted. At Lauds there are no commemorations. At the Hours the hymns have the ordinary Doxology and the antiphons are of the Sunday, not the feast, Prime has Pss. 117, 1181 & 118ii. The
lectio brevis is of the season. At Mass there is only one collect, the Preface is of the Trinity and the last Gospel is
In principio. At Vespers there are no commemorations.