Tirgan Festival and Arash Kamangir Commemoration, Tir 13. This ancient Iranian festival is observed on the thirteenth day of Tir and is closely associated with the legend of Arash Kamangir. The event symbolizes sacrifice and the quest for peace and boundary-setting in Iranian culture. Today, Tirgan is celebrated with rituals such as water splashing, pottery divination, and commemorations of Arash Kamangir in some regions of Iran and among Zoroastrians. The festival highlights the importance of water, rain, and friendship in Iranian tradition and continues to hold a special place among cultural observances.