All Souls’ Day was first instituted at the monastery in Cluny in 993 CE(Common Era)and quickly spread throughout the Christian world. People held festivals for the dead long before Christianity. It was Saint Odilo, the abbot of Cluny in France, who in the 10th century, proposed that the day after All Saints’ Day be set aside to honor the departed, particularly those whose souls were still in purgatory. Today the souls of the faithful departed are commemorated. Although All Souls’ Day is observed informally by some Protestants, it is primarily a Roman Catholic, Anglican and Orthodox holy day.
The Day of the Dead celebrations can be traced back to the various indigenous groups, such as the Aztecs and other pre-Hispanic civilizations, from as far back as 3000 years ago. Skulls were collected and used during rituals to symbolize death and rebirth.
All Souls’ Day in the United States is dedicated to prayers for the dead. The Day of the Dead is also celebrated on this day. Many western churches annually observe All Souls’ Day on November 2 and many eastern churches celebrate it prior to Lent and the day before Pentecost.
Interesting!!! Happy all souls day!!