In the revised liturgical calendar, a weekday on which no special feast or vigil is celebrated in the Mass or the Liturgy of the Hours. On ferial days the Mass may be that of the preceding Sunday, or an optional memorial, or a votive Mass, or a Mass for the deceased. During Advent and Lent ferial days are in a privileged category, and the same freedom in the choice of Masses is not allowed. In general, the Mondays through Fridays of each week are called ferial days (feriae) and are counted, in sequence, from two to six. Sunday, or the Lord's Day (Dominica), is always the first day, and Saturday (Sabbatum) is the seventh day of the week. See also Feria.