This feast, dating back to the 11th Century, is a time to remember all of the faithfully depart and pray that they are now in the grace of God. God certainly is Love and He is mercy. The only thing we can do is trust in Him and pray for our loved ones.
In the middle of the 11th century, St. Odilo, the abbot of Cluny (France), said that all Cluniac monasteries were to offer special prayers and sing the Office for the Dead on November 2, the day after the feast of All Saints. The custom spread from Cluny and was was adopted throughout the entire Roman Catholic Church. Now we the entire Church celebrates November 2nd as All Soul's Day.
To gain a Plenary Indulgence form noon Nov. 1 until midnight Nov. 2, visit the church, pray for the Holy Souls and also for the intentions of the Holy Father. On All Soul's Day and for a week afterward, a Plenary Indulgence for the Holy Souls is granted for a visit to the cemetery with devotion and prayer for the dead. All through November, you can gain partial indulgence every day you visit the cemetery and pray for the dead.