Today is the Feast of the Holy Name of Jesus and is a Double of the Second Class. It is also the Octave Day of St. John the Evangelist. The liturgical colour is white. This feast takes the place of the second 'vacant' Sunday after the Nativity or, when no Sunday falls between the Circumcision and the Epiphany, it is kept on January 2nd. The feast was granted to the Franciscan Order in 1530 to be kept on 14th January. In 1721 the feast was extended to the Universal Calendar to be kept on the second Sunday after the Epiphany. During the 1911-13 reform the feast was moved to the Sunday between the Circumcision and Epiphany or kept on January 2nd if no such Sunday occurred. In the Sarum Rite the feast was kept on August 7th - the date still appears in the Calendar of the Book of Common Prayer.
At Mattins the invitatory is Admirabile nomen Jesu etc and the hymn Jesu, Rex admirabilis etc. In the first nocturn the lessons are from the Acts of the Apostles. In the second nocturn the lessons are taken from a sermon of St. Bernard and a homily from St. Bernard on the Circumcision also provides the homily in the third nocturn. At Lauds the antiphons are proper, the hymn Jesu, decus angelicum. A commemoration of the Octave Day of St. John is sung.
At the Hours the psalmody is festal and the antiphons from Lauds are used in sequence as usual. At Prime, as normal on feasts, psalm 53 is sung before the first two divisions of psalm 118. The short lesson is proper, Omne quodcumque. The Doxologies of the hymns at the Little Hours are changed in honour of the Incarnation, Jesu, tibi sit gloria etc.
The Mass is proper, In nomine Jesu, with Gloria, commemoration of the Octave Day of St. John in private Masses, Credo and preface of the Nativity.
Second Vespers are sung without any commemoration of the following simple Octave day.
In the 'liturgical books of 1962' the feast is second class but gains a first Vespers as it falls on a Sunday. Mattins and Lauds are the same as the Old Rite but there is no Octave day and consequently no commemoration of it. At the Hours the antiphons are from the Sunday Office, not the feast and there is no Doxology in honour of the Incarnation. At Prime psalm 117 is sung in place of psalm 53 and the short lesson is from the season, Ipsi peribunt. Vespers are the same.
In pre-1913 practice the Octave Days of the comites Christi were of double rite and took precedence, like their feasts, over the vacant Sunday. So today would have been celebrated as the Octave Day of St. John with three nocturns and the Te Deum sung at Mattins.