Youth Day is celebrated in Iran on 11th Shaban (Hejri Ghamari) on the birthday of Hazrat e Alie Akbar (first son of Imam Hossein). After Iran revolution in 1979 the extremist Muslim government endeavored to replace all the national days with religious events such as the birth days and death anniversaries of family members of Prophet Mohammad.
(... from Wikipedia on 2012-04-17 12:15:50)