December 1 – World AIDS Day: Raises awareness about HIV/AIDS and supports those living with the condition.

December 3 – International Day of Persons with Disabilities: Advocates for the rights and well-being of individuals with disabilities.

December 5 – World Soil Day: Highlights the importance of healthy soil and sustainable soil management.

December 10 – Human Rights Day: Globally celebrated, it promotes and raises awareness of human rights issues.

December 11 – International Mountain Day: Promotes awareness about the importance of mountains to ecosystems and cultures.

December 18 – International Migrants Day: Recognizes the contributions of migrants and promotes their rights.

December 20 – International Human Solidarity Day: Encourages unity in diversity and reminds of the need to build a fair global society.

December 25 – Christmas Day: Celebrated globally as a major holiday, especially in Christian communities.