But in places where the solemnity of the Epiphany is not a holyday of obligation and is therefore assigned to the Sunday falling between 2 January and 8 January, it often happens that the feast of the Baptism of the Lord coincides with the solemnity of the Epiphany and thus cannot be observed.
In consideration of many petitions on this point and with the approval
of Pope Paul VI, this Congregation of the Sacraments and Divine Worship
decrees:
In places where the solemnity of the Epiphany is to be transferred to the Sunday falling on 7 January or 8 January, with the result that the feast of the Baptism of the Lord would be omitted, this feast is to be transferred to the Monday immediately following that Sunday.All things to the contrary notwithstanding.