December – 1 : World AIDS Day
- Since
- 1988
- Purpose
- World AIDS Day is observed annually on 1 December to raise awareness about HIV/AIDS, support those living with the virus, and commemorate those who have died from AIDS-related illnesses.
- Theme/2025
- Overcoming disruption, transforming the AIDS response
December – 2 : Computer Literacy Day
- Since
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- Purpose
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- Theme
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December – 2 : International Day for the Abolition of Slavery
- Since
- 1986 [UNO]
- Purpose
- To eradicating contemporary forms of slavery, such as trafficking in persons, sexual exploitation, the worst forms of child labor, forced marriage, and the forced recruitment of children for use in armed conflict
- Theme/2025
- Acknowledge the past. Repair the present. Build a future of dignity and justice
December – 2 : National Pollution Prevention Day
- Since
- —
- Purpose
- National Pollution Control Day (also known as National Pollution Prevention Day) is observed in India every year on 2 December. It serves as a solemn reminder of the 1984 Bhopal Gas Tragedy and a call to action for environmental protection and industrial safety.
- Theme/2025
- Sustainable Living for a Greener Future
December – 3 : International Day of Disabled Persons
- Since
- —
- Purpose
- To promote the rights and well – being of persons with disabilities in all spheres of society
- Theme/2025
- Fostering disability inclusive societies for advancing social progress
December – 4 : World Wildlife Conservation Day
- Since
- —
- Purpose
- World Wildlife Conservation Day is observed annually on 4 December to raise awareness about the protection of endangered species and to advocate for the end of wildlife crime.
- Theme/2025
- Wildlife Conservation Finance: Investing in People and Planet
December – 4 : International Cheetah Day
- Since
- 2010
- Purpose
- International Cheetah Day is observed annually on 4 December to raise awareness about the cheetah's race against extinction and to promote global conservation efforts.
- Theme/2025
- Wildlife Conservation Finance: Investing in People and Planet
December – 4 : National Navy Day
- Since
- —
- Purpose
- National Navy Day in India is celebrated annually on 4 December to recognize the achievements of the Indian Navy and commemorate its decisive victory during Operation Trident in the 1971 Indo-Pak War.
- Theme/2025
- Combat Ready, Cohesive and Self-Reliant
December – 4 : International Day of Banks
- Since
- 2020
- Purpose
- International Day of Banks is observed globally on 4 December to recognize the crucial role banking systems play in driving economic growth, maintaining financial stability, and achieving sustainable development.
- Theme/2025
- Banks Powering a Livable Planet
December – 5 : World Soil Day
- Since
- 2014
- Purpose
- World Soil Day is observed annually on 5 December to focus global attention on the importance of healthy soil and to advocate for the sustainable management of soil resources.
- Theme/2025
- Healthy Soil for Healthy Cities
December – 5 : International Volunteer Day
- Since
- 1985
- Purpose
- International Volunteer Day (IVD) is observed annually on 5 December to celebrate the tireless work of volunteers and encourage governments and organizations to support their efforts for global development. Mandated by the UN General Assembly in 1985, it highlights the power of collective action in achieving the Sustainable Development Goals (SDGs).
- Theme/2025
- Every Contribution Matters
December – 6 : Mahaparinirvan Diwas
- Since
- —
- Purpose
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- Theme
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December – 7 : Indian Armed Force Flag Day
- Since
- 1949
- Purpose
- Indian Armed Forces Flag Day is observed annually on 7 December to honour the martyrs and the men and women in uniform who safeguard India's borders and integrity. First observed in 1949, it serves as a day for the nation to express gratitude through voluntary contributions to the Armed Forces Flag Day Fund (AFFDF).
- Theme/2025
- Welfare and Gratitude
December – 7 : International Civil Aviation Day
- Since
- 1994
- Purpose
- International Civil Aviation Day is observed annually on 7 December to recognize the vital role of civil aviation in the social and economic development of nations. It commemorates the signing of the Chicago Convention in 1944, which established the International Civil Aviation Organization (ICAO).
- Theme/2025
- Safe Skies, Sustainable Future
December – 9 : International Anti – Corruption Day
- Since
- 2004 [UNO]
- Purpose
- To raise public awareness for anti – corruption
- Theme/2025
- Uniting with Youth Against Corruption: Shaping Tomorrow's Integrity
December – 9 : International Genocide Commemoration Day
- Since
- —
- Purpose
- The International Day of Commemoration and Dignity of the Victims of the Crime of Genocide and of the Prevention of this Crime is observed annually on 9 December to mark the anniversary of the 1948 Genocide Convention.
- Theme
- —
December – 10 : International Human Rights Day
- Since
- 1950 [UNO]
- Purpose
- Human Rights Day is observed annually on 10 December. It commemorates the day in 1948 when the United Nations General Assembly adopted the Universal Declaration of Human Rights (UDHR), a milestone document that proclaims the inalienable rights everyone is entitled to as a human being.
- Theme/2025
- Human Rights, Our Everyday Essentials
December – 10 : International Animal Rights Day
- Since
- 1998
- Purpose
- International Animal Rights Day is observed annually on 10 December, deliberately shared with Human Rights Day. This shared date highlights the 'Uncaged' campaign's philosophy that all sentient beings deserve the right to live free from suffering, pain, and exploitation.
- Theme/2025
- Voices for the Voiceless: Toward a Compassionate World
December – 11 : UNICEF Day
- Since
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- Purpose
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- Theme
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December – 11 : International Mountains Day
- Since
- 2003
- Purpose
- International Mountain Day is observed globally on 11 December to raise awareness about the critical role mountains play in sustaining life and the urgent need to protect these fragile ecosystems.
- Theme/2025
- Glaciers matter for water, food and livelihoods in mountains and beyond
December – 12 : International Day of Neutrality
- Since
- 2017
- Purpose
- International Day of Neutrality is observed annually on 12 December to raise public awareness about the value of neutrality in international relations and to promote the use of preventive diplomacy.
- Theme/2025
- The Power of Impartiality
December – 12 : International Universal Health Coverage Day
- Since
- 2018
- Purpose
- International Universal Health Coverage (UHC) Day is observed annually on 12 December to advocate for health systems that provide quality, affordable healthcare to everyone, everywhere, without financial hardship.
- Theme/2025
- 'Unaffordable health costs? We're sick of it!
December – 14 : International Monkey Day
- Since
- 2000
- Purpose
- International Monkey Day (also known as World Monkey Day) is celebrated annually on 14 December. It is an unofficial holiday dedicated to celebrating monkeys and all things simian, 'including apes, tarsiers, and lemurs.'
- Theme
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December – 14 : National Energy Conservation Day
- Since
- —
- Purpose
- National Energy Conservation Day is observed annually in India on 14 December to raise awareness about the importance of energy efficiency and highlight the nation's achievements in reducing energy consumption. The day is spearheaded by the Bureau of Energy Efficiency (BEE), under the Ministry of Power.
- Theme/2025
- Green Transformation, Energy Saving
December – 16 : Vijay Diwas (Victory Day)
- Since
- —
- Purpose
- Vijay Diwas (Victory Day) is observed annually in India on 16 December to commemorate the service, valour, and sacrifice of the Indian Armed Forces during the 1971 Indo-Pak War. This decisive 13-day conflict culminated in the largest military surrender since World War II and the subsequent liberation of Bangladesh.
- Theme/2025
- Victory Through Unity and Resolve
December – 17 : International Day to End Violence Against Sex Workers
- Since
- 2003
- Purpose
- International Day to End Violence Against Sex Workers is observed annually on 17 December. It is a global day of action that highlights the high levels of violence, hate crimes, and discrimination faced by sex workers and advocates for their safety and human rights.
- Theme
- —
December – 18 : International Migrants Day
- Since
- 2000
- Purpose
- International Migrants Day is observed annually on 18 December to recognise the contributions of millions of migrants and advocate for the protection of their human rights.
- Theme/2025
- My Great Story: Cultures and Development
December – 20 : International Human Solidary Day
- Since
- 2005
- Purpose
- International Human Solidarity Day is observed annually on 20 December to celebrate global unity in diversity and to remind governments of their commitments to international agreements.
- Theme/2025
- Solidarity for Sustainable Development: Uniting Communities for a Shared Future
December – 21 : World Meditation Day
- Since
- 2024
- Purpose
- World Meditation Day is observed annually on 21 December to raise awareness about the benefits of meditation for individual well-being and global harmony.
- Theme/2025
- Inner Peace, Glogal Harmony
December – 22 : National Mathematics Day
- Since
- 2012
- Purpose
- National Mathematics Day is celebrated in India every year on 22 December. It marks the birth anniversary of the legendary Indian mathematician Srinivasa Ramanujan, who made extraordinary contributions to mathematical analysis, number theory, infinite series, and continued fractions.
- Theme
- —
December – 23 : National Farmers Day
- Since
- 2001
- Purpose
- National Farmers Day (also known as Kisan Diwas) is celebrated in India on 23 December to honor the contributions of farmers to the nation’s food security and economy. This date marks the birth anniversary of Chaudhary Charan Singh, India's fifth Prime Minister and a significant advocate for farmers' rights.
- Theme/2025
- Vikasit Bharat 2047 – The Role of FPOs in Globalising Indian Agriculture
December – 24 : National Consumer Rights Day
- Since
- 1986
- Purpose
- National Consumer Rights Day (also known as Bharatiya Grahak Diwas) is observed in India every year on 24 December. It commemorates the day in 1986 when the Consumer Protection Act received the President's assent, a landmark moment for the consumer movement in India.
- Theme/2025
- Efficient and Speedy Disposal through Digital Justice
December – 25 : National Good Governance Day
- Since
- 2014
- Purpose
- Good Governance Day (Sushasan Divas) is observed in India annually on 25 December. It marks the birth anniversary of former Prime Minister Atal Bihari Vajpayee and was established in 2014 to promote government accountability and awareness among citizens.
- Theme
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December – 26 : Veer Bal Diwas
- Since
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- Purpose
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- Theme
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December First Saturday : World Civil Aviation Day
- Since
- 1996
- Purpose
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- Theme
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