All Saints' Day (November 1st) is a solemnity that honors all the saints, known and unknown, who have achieved the beatific vision in heaven. It is a celebration of the "great cloud of witnesses" (Hebrews 12:1) who inspire the faithful by their holy lives and intercede for us. All Souls' Day follows All Saints' Day and is dedicated to praying for all the faithful departed who are in purgatory. It is a day to remember and offer prayers, especially the Holy Sacrifice of the Mass, for the souls who