September 12 to October 3: Futsal World Cup 2021.
September 28 to October 3: 2021 European Table Tennis Championships.
October 1: opening of the World Expo in Dubai in the United Arab Emirates.
October 2: parliamentary elections in Qatar.
International Consortium of Investigative Journalists Reveals Pandora Papers Financial Scandal;
Kabul Id Gah Mosque bombing in Afghanistan.
Fumio Kishida succeeds Yoshihide Suga as Prime Minister of Japan;
the Nobel Prize in Physiology or Medicine is awarded to David Julius and Ardem Patapoutian for their work on temperature and touch receptors.
elections to the chamber of councilors in Morocco;
Publication of the report of the Independent Commission on Sexual Abuse in the Church (CIASE);
the Nobel Prize in Physics is awarded to Syukuro Manabe, Klaus Hasselmann and Giorgio Parisi for their contributions to the understanding of complex physical systems.
October 6: the Nobel Prize in chemistry is awarded to Benjamin List and David MacMillan for the development of asymmetric organocatalysis.
the Nobel Prize for Literature goes to Abdulrazak Gurnah.
Daesh's Central African Province is expanding its area of activity to Uganda by detonating an improvised explosive device in a police building in Kampala.
October 7 to 9: 28th France-Africa Summit in Montpellier.
attack on the Kondoz mosque in Afghanistan;
the Nobel Peace Prize is awarded to journalists Maria Ressa and Dmitri Muratov.
October 8 and 9: parliamentary elections in the Czech Republic.
October 10: legislative elections in Iraq.
Alexander Schallenberg becomes Federal Chancellor of Austria after the resignation of Sebastian Kurz;
the Nobel Prize in Economics goes to David Card, Joshua Angrist and Guido Imbens.
legislative elections in Saint Helena;
in Norway, the Kongsberg attacks kill 5 people.
October 14: Jonas Gahr Støre becomes Prime Minister of Norway.
October 17: presidential election in Cape Verde.
October 22: presidential election in Fiji.
October 30 and 31: 2021 G20 summit in Rome, Italy.
October 31: legislative elections in Japan.
October: legislative elections in Somalia.