5 December – Belgium's first recorded death by hazing: the 20-year-old KU Leuven student Sanda Dia dies after taking part in the initiation ceremony for the subsequently disbanded Reuzegom fraternity.[8]
9 December – a political crisis emerged over whether to sign the Global Compact for Migration; in an N-VA u-turn the party opposed signing whereas the other three parties in government continued to support it. On 4 December the Prime Minister of Belgium, Charles Michel, announced that the issue would be taken to parliament for a vote.[9] On 5 December, parliament voted 106 to 36 in favor of backing the agreement.[10] Michel stated that he would endorse the pact on behalf of the parliament, not on behalf of the divided government.[11] Consequently, N-VA left the government; the other three parties continue as a minority government (Michel II).
16 December – More than 5,500 people marched in a protest against the Global Compact for Migration, organized by Flemish right-wing parties. A smaller counter-demonstration of around 1,000 people was organised by left-wing groups.[12]
18 December – Prime Minister Charles Michel presented his government's resignation to the King, who accepted it a few days later.[13]
