Birth of the Sun Day; Khorram Rooz Festival, the First of the Deygan Festivals, Dey 1. This day marks the beginning of the Deygan festivals in the Iranian calendar and is also known as Khorram Rooz or Khur Rooz. The sun, symbolizing light and life, is honored on this occasion, and celebrations focus on themes of brightness and joy. Traditionally, families would gather, light fires, and prepare special foods to mark the day. People came together to welcome the new season, using the warmth and light of fire as a symbol of the triumph of light over darkness. The sun holds a special place in Iranian culture, and this day provided an opportunity to celebrate its significance. The Khorram Rooz Festival holds a significant place in Iranian culture as a symbol of the triumph of light over darkness and the start of a new season. It is the first of several Deygan festivals held during the month of Dey, playing an important role in the traditional calendar and ancient rituals of Iran.