The daytime hours include a core of psalmody as do the other hours. However, to the format of hymn, psalms, and reading is added only a minimal introduction, response, concluding prayer and acclamation:
79. The daytime hours begin with the introductory verse, God come to my assistance with the Glory to the Father, As it was in the beginning, and the Alleluia (omitted in Lent). Then a hymn appropriate to the hour is sung. The psalmody is next, then the reading, followed by the verse. The hour concludes with the prayer and, at least in recitation in common, with the acclamation, Let us praise the Lord. R. And give him thanks.
Hymnody is very much a part of daytime prayer:
80. Different hymns and prayers are given for each of the hours so that, in keeping with tradition, they may correspond to the true time of day and thus sanctify it in a more pointed way. Those who recite only one hour should therefore choose the texts that correspond to the true time of day.
In addition, the readings and prayers vary in keeping with the character of the day, the season, or the feast.
How to do the psalms, if one prays one of the daytime hours, or all three:
81. Two psalmodies are provided: the current psalmody and the complementary psalmody. Those who pray one hour should use the current psalmody. Those who pray more than one hour should use the current psalmody at one hour and the complementary psalmody at the others.
82. The current psalmody consists of three psalms (or parts in the case of longer psalms) from the psalter, with their antiphons, unless directions are given to the contrary.
On solemnities, the Easter triduum, and days within the octave of Easter, proper antiphons are said with three psalms chosen from the complementary psalmody, unless special psalms are to be used or the celebration falls on a Sunday, when the psalms are those from the Sunday of Week I of the psalter.
83. The complementary psalter consists of three sets of three psalms, chosen as a rule from the Gradual Psalms.
How many readers pray the daytime hours?