Dugderan festival is to marked the beginning of fasting in Ramadan. It is held in the city of Semarang. It started in colonial times and is concentrated in the area of Simpang Lima. The celebration was opened by the Mayor of the city and attended by a number of fireworks. The name of dugderan is derived from the onomatopoeia of the burst sound of the fireworks. There is one show that is always associated with the festival namely warak ngendok.
Source of pic: indonesiatavelguides.com