September 20: Blessed Francis de Posadas, C., O.P., III Class

Today, in the 1962 Dominican Rite Calendar, we celebrate the feast of Blessed Francis Possadas, confessor of the Order of Preachers.  The feast is III Class, but this year it falls on Ember Friday in September, so a commemoration is made of his feast at Lauds only.

September 18: St. John Massias, C., O.P., III Class

Today, in the 1962 Dominican Rite Calendar, we celebrate the feast of Saint John Massias, a lay brother of the Order of Preachers.  The feast is III Class, but this year it falls on Ember Wednesday in September, so a commemoration is made of his feast at Lauds only

September 10: Blessed Alphonsus Navarrete, O.P., and Companions, Mm., III Class

Today, in the 1962 Dominican Rite Calendar, we celebrate the feast of Blessed Alfonso Navarrete and Companions.  A commemoration is made of St. Nicholas of Tolentino, Confessor.  The lesson at Matins describes the heroic virtue of these martyrs of Japan.  The Dominicans made up a large contingent of those who were killed.  Also represented were the Franciscans, Jesuits, and Augustinians.

September 9: Obit V.B. Thomas de Vio, Cajetan, 38th Master General of the Order

Today, in the 1962 Dominican Rite Calendar, at Pretiosa we make a commemoration of the 38th Master General of the Order, Thomas de Vio, Cajetan, who was a Cardinal of the Holy Roman Church. 

Cajetan is one of the most famous of all the Masters General in the history of the Dominican Order.  

September 6: Blessed Bertrand of Garrigue, C., O.P., Commemoration

Today, in the 1962 Dominican Rite Calendar, we make a commemoration of Blessed Bertrand of Garrigua, Confessor, of the Order of Preachers.  Since today is a ferial day, the ferial office is prayed, and a commemoration is made of Bl. Bertrand at Lauds only.
From “Short Lives of the Dominican Saints” (London, Kegan Paul, Trench, and Trübner & Co., Ltd., 1901):

September 5: Anniversary of the Associates and Benefactors of our Order

Today, in the 1962 Dominican Rite Calendar, we commemorate the Anniversary of the Deceased Associates and Benefactors of our Order.  At Pretiosa today, the Anniversary is announced as follows:

The Anniversary of the deceased friends and benefactors of our Order. 

At Pretiosa, Psalm 129 is prayed, as it always is on the day of an Anniversary.  Afterwards, the Prayer for an Anniversary is prayed.  The Office of the Dead is also prayed, if not during the day, at least within the same week.