US Bishops: when consecutive obligations occur on Saturday-Sunday or Sunday-Monday, the faithful must attend Mass twice to fulfill two separate obligations.

In a newsletter issued earlier this year, the U.S. Catholic bishops addressed questions regarding whether Sunday and Holy Day Mass obligations can be fulfilled with a “two
-for-one” Mass attendance at Christmas this year. In a “relatively rare” situation which last occurred in 2006, Christmas Day this year falls on a Monday.  Because Catholics are obliged to attend Mass for Sundays and Holy Days of Obligation, some have asked whether a Sunday evening Mass on Christmas Eve would fulfill both the obligation for a Sunday Mass and the obligation for a Christmas Day Mass.

The U.S. Bishop’s Committee on Divine Worship has said the faithful should attend two Masses to fulfill their Sunday and Christmas Mass obligations. Holy Communion may be taken at both Masses, as long as the communicant is in the state of grace.