The Code of Canon Law of the Catholic Church (Canon 1246) lists ten Holy Days of Obligation, including Epiphany (January 6). However, the canon also notes that "With the prior approval of the Apostolic See, . . . the conference of bishops can suppress some of the holy days of obligation or transfer them to a Sunday." Must Catholics go to Mass on January 6?
In those countries where the celebration has been transferred to Sunday, Epiphany remains a Holy Day of Obligation (as Ascension does when it is transferred to the Sunday following Ascension Thursday), but you fulfill your obligation by attending Mass on that Sunday.
Because attendance at Mass on a holy day is obligatory (under pain of mortal sin), if you have any doubts about when your country or diocese celebrates Epiphany, you should check with your parish priest or diocesan office.
To find out which day Epiphany falls on in the current year, see When Is Epiphany?
More on Holy Days of Obligation:
- Definition of Holy Days of Obligation
- Holy Days of Obligation in the Latin Rite of the Catholic Church
- Holy Days of Obligation in the United States