On July 4th, Catholic priests will have a choice in how they conduct Mass due to the liturgical calendar. The day falls on the 13th Saturday in Ordinary Time and includes two optional memorial feasts: Saint Elizabeth of Portugal and the Blessed Virgin Mary. This means clergy can select from three different sets of prayers and readings for the service. The availability of these optional memorials grants priests greater flexibility in shaping the liturgy. The choice impacts the structure of the Mass and the liturgical colours worn by the priest. This provides an opportunity for varied and individualized worship experiences within the Catholic Church.