The honey cakes are set out for the fairies and for our dearly departed loved ones. This is where the tradition of passing out sweets comes from.
Typically, a plate of food and an empty chair are set out for the dead at the family dinner table. This invites them to bestow their blessings upon us and reminds them that we still think of them.
The tradition of wearing costumes comes from the Celts, who would dress in animal pelts to confuse the spirits, lest the should cart away a member of the living.
Jack o'Lanterns are carved to frighten the evil spirits away.
October 31st is the Celtic New Year, when the old season dies and goes into slumber. Celebrate this time and may everyone have a safe and Happy Halloween.