Monday, December 8th is a Holy Day of Obligation. [St. Teresa] will have a Sunday 5:30 p.m. vigil Mass, and Monday 6:30 & 8:15 a.m. & 6:30 p.m. Masses. the Sunday 5:30 p.m. Mass will be the anticipated Mass for Monday. Attending one evening Mass on Sunday will not suffice to fulfill the obligation for both the Holy Day and Sunday. There must be attendance at two distinct Masses.