FERIA, in the Romish breviary, is applied to the several days of the week; thus Monday is the feria secunda, Tuesday the feria tertia; though these days are not working days, but holidays. The occasion of this was, that the first Christians were used to keep the easter-week holy, calling Sunday the prima feria, &c. whence the term feria was given to the days of every week. But besides these, they have extraordinary ferie, viz. the three last days of passion-week, the two following easter-day, and the second ferie of rogation.