The Solemnity of the Immaculate Conception of the Blessed Virgin Mary on December 8th is a Holy Day of Obligation. At St. Helen’s, there will be a Vigil Mass on Wednesday, December 7th, at 6:30pm, and a Mass on Thursday, December 8th, at 8:30am. At Holy Trinity, Mass will be on Thursday, December 8th, at 12 noon.