Tiregan is one of the biggest festivals in ancient Iran. Traditionally, it is held on the 13th day of the month of Tir, (the 4th month of the Persian calendar) which corresponds to the 4th July in the Gregorian calendar. This celebration is held near water sources, and people gather there exciting and pour water on each other. It is accompanied by wishing for abundant rains and no draughts. There are other traditions related to Tiregan, and they vary in each region.