Ordo question

[FAH]

In the ordo that I have it says today (13th of August) is a ferial day, but then underneath it says commemoration of SS. Hippolytus and Cassian at Low Masses. So does this mean that every low Mass today will be a commemoration of SS. Hippolytus and Cassian, and a High Mass would be of the ferial day? Or does this mean the Priest has the option to celebrate the Mass of SS. Hippolytus and Cassian of keep the feria? Sort of like an optional commemoration in the new calendar?

And if the Priest chooses to keep the feria can he only use the Mass of this past Sunday (XII after Pentecost) or can he use any Mass of the season, for example the Mass of the XVII Sunday after Pentecost?\

Many thanks.

 

[Rich_C]

I’m no expert, but commemorations appear in my missal and breviary pretty often. In every case, the Mass or office wasn’t in their honor, but a few prayers were added to remember them and ask their intercession. What I mean it, it’s still a feria day even if there’s a commemoration. Some extra propers get added so none of the feria ones are replaced.

As for all of father’s options, I don’t know. But on feria days I’ve only seen two things done: either last Sunday’s propers were said, or in cases of a votive Mass, the propers of a votive Mass were said (I think today is the normal votive Mass is for the holy angels).

I hope that helps.