August 5,. Commemorating the dedication of the church of Santa Maria Maggiore in Rome, built by Pope Liberius, restored by Pope Sixtus III, who dedicated it to Our Lady. The feast receives its name from the legend that the Blessed Virgin had indicated with snow the spot on which she wished a basilica erected in her honor. It was extended to the universal Church by Pope Pius V, the Mass and Office of the day being those commonly used on feast-days of the Blessed Virgin.