Ferias.

Text is from The Saint Andrew Daily Missal,

unless stated otherwise.

Ferias are Week-Days on which no Feast of a Saint is kept.

Ember Days (which are Ferias), Rogation Days (which are Ferias), and every Feria in Lent, have a special Mass.

On other Ferias, The Mass of the preceding Sunday is said.

Some Ferias are called Greater Ferias, and are divided into two Classes:

a. Privileged Ferias.

These are:

Ash Wednesday;
The First Three Days of Holy Week.

Privileged Ferias do not give place to a Feast.

b. Non-Privileged Ferias.

These are:

Ferias of Advent;
Ferias of Lent;
The Ember Days;
The Monday of Rogation Week.

A Commemoration of Non-Privileged Ferias is always made on Feast Days.

Non-Privileged Ferias’ Gospels are The Last Gospel at Feast Day Masses.

On the Ferias of:

Lent (after Ash Wednesday);
and those in Passiontide (before Palm Sunday);
and The Ember Days (not those in Pentecost Week);
and on Monday of Rogation Week;
and on Ordinary Vigils;

if a Greater-Double Feast,
Double Feast,
or,
Semi-Double Feast,
is kept,

it is allowed in Private Masses to say The Mass of The Feria, or of The Vigil,
with a Commemoration of The Feast,

or,

it is allowed in Private Masses to say The Mass of The Feast,
with a Commemoration and Last Gospel of the Feria or the Vigil.