This year the solemnity of the Immaculate Conception is transferred to Monday, Dec. 9, so as to not conflict with the second Sunday of Advent. In prior years, when the Solemnity of the Immaculate Conception was transferred to a Monday, the obligation to attend Mass was waived. The Vatican has since offered clarification to the U.S. Bishops that even when the Solemnity falls on a Monday the obligation to attend Mass remains. 

Evening Masses on Sunday, Dec. 8, may be used to fulfill the Dec. 9 holy day obligation provided that you also attend a separate Mass to fulfill your Sunday obligation.

We look forward to seeing you when we celebrate this holy day together on Monday, Dec. 9 this year!