Today, in the 1962 Dominican Rite Calendar, we celebrate the feast of St. Hyacinth. The feast is III Class so the Ordinary office is prayed according to the rubrics. Like many III Class feasts of Dominican saints on the calendar, the office for St. Hyacinth contains a full set of propers, as if the office were II Class. So there are antiphons and responsories at all of the hours, and the Sunday Psalms are prayed at Lauds, rather than the Psalms of the ferial office.
The feast was announced yesterday, at the reading of the Martyrology:
At Cracow in Poland, St. Hyacinth, confessor, of the Order of Preachers. Having received the religious habit from the hands of our Father St. Dominic, he excelled in learning and in a life of admirable innocence. He was celebrated for the glory of his miracles, especially for walking dryshod across wide rivers. Thought deserving of sweet converse with the holy Mother of God, distinguished for his spotless life, and filled with the gifts of the Holy Ghost, he died at an advanced age. He was called to his eternal reward on the very feastday of the Assumption of the Blessed Virgin Mary. He was canonized by Pope Clement VIII.