As our readers know, it has become our custom at Thomistica.net to celebrate "both" feasts of St. Thomas Aquinas. January 28 is Aquinas’s liturgical feast according to the General Roman Calendar promulgated by Paul VI in 1969. On that date in 1369 Aquinas’s relics were translated to the Dominican church in Toulouse. March 7 is Aquinas's liturgical feast according to the 1960 General Roman Calendar (and earlier calendars). Aquinas died on that date in 1274 at the abbey of Fossanova, where he had stopped after taking ill on his way with Reginald of Piperno to the second Council of Lyons.
From the oratio secreta of the feast day Mass of the 1962 Missal:
Sancti Thomae Confessoris tui atque Doctoris nobis, Domine, pia non desit oratio: quae et munera nostra conciliet; et tuam nobis indulgentiam semper obtineat.