The Western celebration of All Souls' Day is on 2 November and follows All Saints' Day, which commemorates the departed who have attained the beatific vision.If 2 November falls on a Sunday, the Mass is of All Souls, but the Office is that of the Sunday.
Purgatory is necessary so that souls can be cleansed and perfected before they enter into heaven. Thus made atonement for the dead that they might be free from sin." Additional references are found in Zechariah, Sirach, and the Gospel of Matthew.
Jewish tradition also reinforces this belief as well as the tradition and teaching of the Church, which has been affirmed throughout history.
The Church reeled from Luther's accusation, and reformed its practice of selling indulgences.
However, it reemphasized the Biblical and traditional practice of praying for the departed and the importance of such prayers.
Another popular name in English is Feast of All Souls.