Today in the traditional Roman calendar it is the feast of the 3rd c. Sicilian martyrs St. Placid and companions, slain during the reign of the Emperor Diocletian.
Today in the revised calendar is the feast of Sts. Placid and Maurus, companions of St. Benedict in the 6th c.
The saints are sometimes confused and both have their feast on 5 October.
Here is the Vatican Curia’s calendar.
Here is the entry in the 2005 Martyrologium Romanum.
5. Commemoratio sancti Placidi, monachi, qui inde a pueritia carissimus fuit discipulus sancti Benedicti.
Here is the entry in the1878 Martyrologium Romanum.
Messanae in Sicilia natalis sanctorum Martyrum Placidi Monachi, discipuli beati Benedicti Abbatis, et fratrum eius Eutychii et Victorini, ac Flaviae Virginis eorum sororis; item Donati Firmati Diaconi, Faisti, aliorumque trignita Monachorum, qui a Manucha pirata pro Christi fide necati sunt.
I have always had an interest in St. Placid, the Benedictine of the 6th c., because of a book I found during a retreat when I was in seminary. The book is called La vie de petit st Placid… The Life of Little St. Placid by Mother Geneviève Gallois. I have it in French and in English.
A sister name Placida came to Mother Geneviève and asked her to draw her a picture. Mother drew 104 and thus the book was born. It is a work of deep spiritual value and nearly painful charm.
Mother Genevieve, who had come from an extremely anti-clerical background, was a talented painter. She had bad health and a hard time when at 23 she entered the convent of the Les Bénédictines de la rue Monsieur (20 rue Monsieur in the 7e arrondissement). She wound up being a novice for 22 year, in fact.
Here is one of her paintings.
A couple more images from the book.
About Mass. Click to enlarge.