
Halloween started as the Celtic festival of Samhain which falls every year on October 31st. The Druids saw the holiday as the end of the growing year, and the beginning of the next. It was said to be a time when many spirits were about. This made it a good time for telling fortunes.
When Christianity overtook the Celtic lands Samhain was transformed into All Saints Eve. All Saints Eve is also known as All Hallows Eve, which became Halloween. Halloween came to the United States with the Celtic immigrants from Ireland and Scotland.
In Ireland and Scotland people make decorations from turnips on Halloween. They will hollow out the turnip, carve a face into it, and light it with a burning candle inside. When the Celts came to the United States they made the same decorations, using pumpkins instead of turnips.