The carving of pumpkins originates from the Samhain festival, when Gaels would carve turnips to ward off spirits and stop fairies from settling in houses.
Meanwhile in Germany, people hide their knives to make sure none of the returning spirits are harmed – or seek to harm them!
Like the Celts, the Europeans of that time also believed that the spirits of the dead would visit the earth on Halloween. They worried that evil spirits would cause problems or hurt them. So on that night people wore costumes that looked like ghosts or other evil creatures. They thought if they dressed like that, the spirits would think they were also dead and not harm them.