Today is the Feast of the Precious Blood.
It was a favorite devotion of St. John XXIII, who approved and promulgated the Litany of the Precious Blood and issued an Apostolic Letter on Devotion to the Precious Blood in 1960.
The Church's wonderful advances in liturgical piety match the progress of faith itself in penetrating divine truth. Within this development it is most heart-warming to observe how often in recent centuries this Holy See has openly approved and furthered the three devotions just mentioned. From the Middle Ages, it is true, many pious persons practiced these devotions, which then spread to various dioceses and religious orders and congregations. Nevertheless it remained for the Chair of Peter to pronounce them orthodox and approve them for the Church as a whole. _ St. John XXIII
St. John XXIII, pray for us!