Trinity Catholic Calendar. The feast of the blessed trinity was introduced in the ninth century and was only inserted in the general calendar of the church in the fourteenth century by pope john xxii. Each year, the usccb secretariat of divine worship publishes the liturgical calendar for the dioceses of the united states of america.
Each year, the usccb secretariat of divine worship publishes the liturgical calendar for the dioceses of the united states of america. Louis de montfort) and incorporates the traditional customs and discipline for the united states of america.