When the Vigil of St. Andrew falls within Advent nothing of the Vigil is made in the Office of the Advent ferial day. However, Mass is of the Vigil with a commemoration of Advent. The day is of simple rite and the liturgical colour is violet.
At Mattins the invitatory is Hodie scietis etc and the Office hymn Verbum supernum. The antiphons and psalms of the nocturn are taken from the Psalter for Tuesday. The lessons are from the second chapter of Isaiah. At Lauds the second scheme of psalms is sung, the remnant of old ferial Lauds, beginning with the Miserere. The hymn is En clara vox. The antiphon on the Benedictus is proper to the day, Antequam convenirent etc. After the antiphon has been sung in its entirety after the canticle the ferial preces are sung with the choir kneeling. After the collect (of the previous Sunday) a commemoration is sung of St. Saturninus.
At Prime psalm 95, displaced by the second scheme of Lauds, is added to the psalm of the day (Pss. 24i, 24ii, 24iii & 95). The antiphon In illa die is sung with psalms. The chapter is the ferial Pacem et veritatem. The Advent verse, Qui venturus es in mundum, is sung in the short responsory. Both the Dominical and ferial sets of preces are sung with the choir kneeling.
At the other Hours the antiphons Jucundare etc are sung with the psalms of Tuesday. The short set of ferial preces are sung, with the choir kneeling, before the collect.
The Mass of the Vigil of St. Andrew is sung after None. The ministers wear violet dalmatic and tunicle and so the organ may be played. The Mass Dominus secus mare Galilaeae is sung. There is no Gloria. The second collect is of the Advent feria, the third collect of St. Saturninus. Benedicamus Domino is sung as the dismissal.
In the 'liturgical books of 1962' the Vigil of St. Andrew has been abolished. In the ferial Office of the day the ferial preces are not sung at Lauds or the other Hours. At Prime psalm 95 is not sung and the chapter is the festal Regi saeculorum. Mass is of the ferial day but the ministers wear dalmatic and tunicle. In sung Masses there is only one collect. The dismissal is Ite, missa est.