X Following a public outcry, Twitter apologises and backtracks one day after saying that it would begin deleting inactive accounts outside the United States on December 11, after users were upset that the measure would cause the removal of accounts belonging to users who had died. It now says that it will first implement a process for "memorialising" dead users. It would have been the first large scale cull of inactive accounts on the social media platform.
Ninth European Parliament The European Parliament confirms the Von der Leyen Commission, which will begin acting on December 1.
2019 Namibian general election Citizens of Namibia head to the polls to elect both the country's president and National Assembly members.
2019 Guinea-Bissau presidential election The latest presidential election in Guinea-Bissau has to go into a second round on December 29 as no candidate managed to win more than 50% of the votes during the first round. The second round will be a run-off between Domingos Simões Pereira and Umaro Sissoco Embaló while incumbent president José Mário Vaz was eliminated from the race.
China–United States relations U.S. President Donald Trump signs the Hong Kong Human Rights and Democracy Act into law despite strong opposition from China. The bill means the U.S. will only trade with Hong Kong if it retains enough autonomy and bans the export of crowd-control munitions to Hong Kong Police Force.
Chemical plant A chemical plant producing butadiene in Port Neches, Texas, United States, explodes and burns. It damages thousands of buildings over several square miles and sending three workers to the hospital.
Second Libyan Civil War The eastern-based Libyan National Army loyal to Field Marshal Khalifa Haftar recaptures the strategic Elephant Field oil field in southwestern Libya after driving out GNA forces with airstrikes.
Allied Democratic Forces insurgency Islamist militants of the Allied Democratic Forces kill nineteen people near the city of Oicha in the Democratic Republic of the Congo, following a week's worth of protests against the mass killings from rebels that killed four others near a United Nations base.