Taylor Reints: Halloween is an observance that exemplifies the meaning of fear. On this day, millions of children will dress their scariest, hoping to get a taste of candy. But where exactly did Halloween come from? Perhaps the oldest record of a holiday similar to Halloween was practiced by the Celts in an event called Samhain. According to the Celtic calendar, the beginning of the year started on November 1. They believed that on October 31 and November 1, the door to the netherworld opened, allowing the spirits of the dead to return to Earth. The Celts celebrated with a large festival and feast.