The fourth Gahanbar, meaning ‘bringing home the herds,’ celebrating the creation of plant life by Ahura Mazda. Associated with the Amesha Spenta Ameretat (Immortality), guardian of plants and vegetation. As the herds return from distant pastures and the last vegetation withers, this festival acknowledges the approaching dominion of winter and Angra Mainyu’s seasonal advance. The end of Ayathrem marks the moment when Rapithwin retreats underground, taking warmth to the roots and waters to sustain creation through the dark months.