The students first meet at the Grand Sablon Square , and after several hours , the trucks start to move towards the Brussels Stock Exchange on Boulevard Anspach . This takes several hours as well , as the trucks move only at a walking speed and are more often than not stopped due to the students surrounding them and on the road . Beer may not be served while the trucks are in motion . All roads which the procession goes on are closed to other traffic , including Boulevard Anspach , Brussels ' main street . The students then disperse and reconvene around 9 pm at ULB 's Solbosch campus , where all the year 's decorations are burnt semi-ceremonially . Many alumni come to the university 's discothèque on that night , which is normally only open to current students . After the 2016 Brussels bombings the city council decided to cancel the event for the first time since World War II , however a large part of the students ignored that and proceeded to occupy the traditional starting point of the Grand Sablon Square only to later continue with the procession on foot . The year after that the City council forbade the use of the transport trucks and limiting the consumption of alcohol to the start - and endpoint , the students responded by throwing flour at each other and passers-bys . The origins of the flour-throwing dates back to a past tradition of the holiday where the students threw eggs , flour and water at the local catholic Bourgeoisie who used to live in and near the Grand Sablon Square after they repeatedly pleaded with to city council to try and stop the event from happening because they disapproved of the students using the Grand Sablon Square as their starting point .
2016 Brussels bombings
2016 Brussels bombings
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