The Solemnity of the Immaculate Conception of the Blessed Virgin Mary is NOT a Holy Day of Obligation.
Bishop Mark Beckman has dispensed the faithful in the Diocese of Knoxville from the obligation to attend Mass on Monday, Dec. 9, the solemnity of the Immaculate Conception of the Blessed Virgin Mary.
Please vist the link below for more information.
https://dioknox.org/news/obligation-to-attend-mass-dispensed-on-dec-9