On Feria Days you may like to pray your Mass for
the Holy Souls in Purgatory
MASS for the Dead ranks amongst Votive Masses.
A Votive Mass does not correspond with the Office of the day; it is said by the choice of the priest, hence its name (votum). A Votive Mass may be said on all days except Sundays, feasts of double and more than double rank, and certain other days specially excepted.
Daily Mass for the Holy Souls is in the Missal.