Mehrgan is an ancient Persian festival celebrated in autumn, marking the harvest season and the arrival of cooler weather. It typically falls around the 21st of September and is associated with the goddess of fertility and abundance, Anahita. The festival symbolizes gratitude for the earth's bounty and the changing of the seasons. During Mehrgan, people engage in various customs, including feasting, decorating their homes with autumnal flowers, and sharing meals with family and friends. The celebration emphasizes community, love, and the importance of nature, reflecting the deep cultural roots of Zoroastrianism in Persian traditions.