Temadage i december 2099

• 4. december 2099
  International Bankdag International FN-dag
  International dag mod ensidige tvangsforanstaltninger International FN-dag
• 5. december 2099
  Verdens Jordbundsdag International FN-dag
• 9. december 2099
  International mindedag for ofre for folkedrab International FN-dag
• 12. december 2099
  International dag for universel sundhedsdækning International FN-dag
  International Neutralitetsdag International FN-dag
• 14. december 2099
  International dag mod kolonialisme i alle dens former International FN-dag
• 18. december 2099
  Arabisk sprogdag International FN-dag
• 21. december 2099
  World Basketball Day International FN-dag
  World Meditation Day International FN-dag
• 24. december 2099
  International Anti-Cybercrime Day International FN-dag
• 27. december 2099
  International Day of Epidemic Preparedness International FN-dag