Mass of the Lord’s Supper: 5:30 p.m. Adoration: following Mass until 9 p.m. Except for the resurrection on Easter, Holy Thursday is possibly one of the most important, complex, and profound days of celebration in the Catholic Church. Holy Thursday celebrates the institution of the Eucharist as the true body and blood of Jesus Christ and the institution of the sacrament of the priesthood. *There is no Thursday 8 a.m. Mass at Holy Family.