Every 21 March at dawn, thousands of Zenica citizens gather at Kamberovica field (a recreational complex and park by the river Bosnia) to celebrate the first day of spring . The celebration begins with preparation of traditional breakfast at the open – ” Chimbur ” (a dish of eggs) . Many people even set up their tents the night before, so they can be there when the sun rises. On that day, the bravest among them open a swimming season on the river Bosnia . The rest of the day is practically a huge barbecue party in which the whole city takes part and lasts until late at night.