Σαμχάιν (Samhain) is an ancient Celtic festival celebrated on the night of October 31st. It marks the end of the harvest season and the beginning of winter. Traditionally, it is believed to be a time when the boundary between the living and the dead is blurred, allowing spirits to roam the earth. People would light bonfires and wear costumes to ward off these wandering spirits. The festival is considered a precursor to modern-day Halloween. Many customs associated with Σαμχάιν, such as carving pumpkins and trick-or-treating, have evolved over time. Today, it is celebrated by various neopagan and Wiccan communities as a time to honor ancestors and reflect on the cycle of life and death.