Thursday, December 8, is the Feast of the Immaculate Conception, a Holy Day of Obligation. Masses will be celebrated as follows: Nativity of the Blessed Virgin Mary: Wednesday, December 7, 7:00 PM; Thursday, December 8, 7:00 PM. Saint Mary of the Lake: Thursday, December 8, 8:00 AM; Thursday, December 8, 7:00 PM.