Holy Days of Obligation
In England and Wales the Holy Days of Obligation are:
Sundays throughout the year, the Epiphany, the Ascension, Ss Peter and Paul, the Assumption, All Saints and Christmas.
A holy day of obligation is a specific feast day when Catholics are obliged to go to Mass and mark that feast day by celebration. On these days Catholics are also to abstain from such work or business that would prevent the worship that is due to God and the joy that is appropriate to the Lord’s Day and the great feasts.
We should treat a holy day of obligation as a Sunday as far as possible, with holy joy and holy feasting. Let the Church’s celebrations guide those of the world.
The obligation of attending Mass on a holy day of obligation can be fulfilled by going to Mass on the day itself or on the evening of the previous day. Ss Peter and Paul (Friday 29th June) is just such a Feast Day.