Samhain is a sacred and ancient Celtic festival that marks the end of the harvest season and the beginning of winter. It holds deep spiritual significance as it honors our ancestors, acknowledges the time of year when the veil between the physical and spiritual worlds is thinnest, and embraces the mysteries of life and death. Samhain typically takes place from October 31st to November 1st and involves various rituals and traditions, such as ancestor veneration, divination, bonfires, feasting, and releasing and renewing rituals.