Halloween Halloween is celebrated every year on the night of October 31 and it has its origins in ancient Celtic and Roman traditions. The ancient Celtic peoples lived in various regions of Ireland, England, Scotland and France. When the end of October came, they held a great ceremony to commemorate "the end of the harvest" which was known as “Samhain” . This was considered the "Celtic New Year", which began with the dark season. It is both a holiday of transition and opening to the other world. The ancient Celts believed that the line joining this world with the Otherworld was narrowing with the arrival of “Samhain”, allowing spirits to pass through. There were sorcerers called druids who believed that magic and witches enjoyed greater power and that ghosts came from the dead to take the living with them. Which is why they lit huge bonfires, made spells and danced around in costumes to scare off ghosts. Some people left sweets or food at the door of their houses with the intention that the deceased would be happy and leave them alone. Nowadays this holiday is well-known for the children who dress up for the occasion and stroll through the streets asking for sweets from door to door. After knocking on the door the children pronounce the phrase "trick or treat". If the adults give them candy, money or any other type of reward, it is interpreted that they have accepted the deal. If on the contrary they refuse, the boys will spend a small joke on them.