Best Uk Ais January 1 2024 A Holy Day Of Obligation. A holy day of obligation is when catholic churches (roman and eastern) commemorate an important religious event, and observing catholics are expected to attend mass. As of autumn, 2017, there are six solemnities of the church which are established in england and wales as holy days of.

With effect from the first sunday of. In the catholic church, holy days of obligation are the days on which the faithful are obliged to participate in the mass.