Below is a list of days that have been recognised as international observancesby the United Nations December.
| 1 December | World AIDS Day | |
| 2 December | International Day for the Abolition of Slavery | |
| 3 December | International Day of Persons with Disabilities | |
| 5 December | International Volunteer Day for Economic and Social Development | |
| 5 December | World Soil Day | |
| 7 December | International Civil Aviation Day | |
| 9 December | International Anti-Corruption Day | |
| 10 December | Human Rights Day | |
| 11 December | International Mountain Day | |
| 18 December | International Migrants Day | |
| 20 December | International Human Solidarity Day |
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