Today is the feast of King David, the revered Old Testament king and prophet. The Orthodox Church remembers King David on December 26th. The Latin Church, however, does not typically commemorate David as a saint on the universal calendar but he is listed in the Roman Martyrology (2005). It is the Eastern Church that recalls and commemorates more seriously King David in the Liturgy than the Latin Liturgy does. In any event, the Roman Martyrology says:
Commemoratio sancti David, regis et prophetae, qu, filius Iesse Bethlehemitae, gratiam invenit ante Deum et oleo sancto a Samuele propheta unctus est, ut populum Israel regeret; in civitatem Ierusalem Arcam foederis Domini transtulit ac Dominus ipse mox ei iuravit semen eius in aeternum mansurum esse, eo quod ex ipso Iesus Christus secundum carnem nasciturus esset.
We should recall what the Catechism says, “the shepherd who prays for his people and prays in their name” (2579), pointing to the figure of David at an OT figure of Jesus.
More on King Saint David can be found here.