The next lower rung is the feast. First, no special Vespers for the evening prior:
231. Feasts have no evening prayer I, except those feasts of the Lord that fall on a Sunday. At the office of readings, at morning prayer, and at evening prayer, all is done as on solemnities.
But the OoR and the hinge hours are prayed as they would be for a solemnity.
232. At daytime prayer, the hymn of the weekday is used. The weekday psalms with their antiphons are said, unless a special reason or tradition requires a proper antiphon; this will be indicated as the case occurs. The reading and concluding prayer are proper.
233. Night prayer is said as on ordinary days.