This entry is about the very old custom and tradition of the pagan holiday Samhain (pronounced 'SOW-wane'), known more recently as Halloween whose own origins are based somewhat on its preceding pagan holiday in a blending of the observance of Roman Catholic saints (the dead ones (their only kind), that is).
First, let's have some background on this day from Wikipedia:
Samhain (sɑːwɪn)[1] was a Gaelic harvest festival held on October 31–November 1. It was linked to festivals held around the same time in other Celtic cultures, and was popularised as the "Celtic New Year" from the late 19th century, following Sir John Rhys and Sir James Frazer.[2] The date of Samhain was associated with the Catholic All Saints' Day (and later All Souls' Day) from at least the 8th century, and both the secular Gaelic and the Catholic liturgical festival have influenced the secular customs now connected with Halloween.[3]