January
- January 4: World Braille Day​
- January 12: National Youth Day (India)​
- January 14: World Logic Day​
- January 24: International Day of Education​
- January 24: World Day for African and Afrodescendant Culture​
- January 25: Himachal Pradesh Statehood Day (Himachal)
- January 26: Republic Day (India)​
- January 27: International Holocaust Remembrance Day​
February
- February 2: World Wetlands Day​
- February 4: World Cancer Day​
- February 11: International Day of Women and Girls in Science​
- February 13: World Radio Day​
- February 20: World Day of Social Justice​
- February 21: International Mother Language Day​
March
- March 1: Zero Discrimination Day​
- March 3: World Wildlife Day​
- March 4: World Engineering Day for Sustainable Development​
- March 8: International Women's Day​
- March 14: International Day of Mathematics​
- March 20: International Day of Happiness​
- March 20: International Francophonie Day​
- March 21: International Day for the Elimination of Racial Discrimination​
- March 21: World Poetry Day​
- March 21: International Day of Nowruz​
- March 22: World Water Day​
- March 23: World Meteorological Day​
- March 24: World Tuberculosis Day​
- March 25: International Day of Remembrance of the Victims of Slavery and the Transatlantic Slave Trade​
April
- April 2: World Autism Awareness Day​
- April 5: International Day of Conscience​
- April 6: International Day of Sport for Development and Peace​
- April 7: World Health Day​
- April 15: Himachal Day (Himachal)
- April 15: World Art Day​
- April 22: International Mother Earth Day​
- April 23: World Book and Copyright Day​
- April 29: International Dance Day​
- April 30: International Jazz Day​
May
- May 1: International Workers' Day (May Day)​
- May 3: World Press Freedom Day​
- May 5: African World Heritage Day​
- May 5: World Portuguese Language Day​
- May 16: International Day of Light​
- May 16: International Day of Living Together in Peace​
- May 20: World Bee Day​
- May 21: World Day for Cultural Diversity for Dialogue and Development​
- May 22: International Day for Biological Diversity​
- May 31: World No-Tobacco Day​
June
- June 5: World Environment Day​
- June 8: World Oceans Day​
- June 14: World Blood Donor Day​
- June 17: World Day to Combat Desertification and Drought​
- June 20: World Refugee Day​
- June 21: International Day of Yoga​
- June 26: International Day against Drug Abuse and Illicit Trafficking​
July
- July 7: Kiswahili Language Day​
- July 11: World Population Day​
- July 18: Nelson Mandela International Day
- July 20: World Chess Day​
- July 26: International Day for the Conservation of the Mangrove Ecosystem​
- July 30: International Day of Friendship​
August
- 9 August: International Day of the World's Indigenous People
- 12 August: International Youth Day
- 15 August: Independence Day (India)
- 19 August: World Humanitarian Day
- 23 August: International Day for the Remembrance of the Slave Trade and its Abolition
September
- 5 September: Teachers' Day (India)
- 8 September: International Literacy Day
- 9 September: International Day to Protect Education from Attack
- 15 September: International Day of Democracy
- 20 September: International Day of University Sport
- 21 September: International Day of Peace
- 28 September: International Day for Universal Access to Information
October
- 2 October: Gandhi Jayanti (India)
- 5 October: World Teachers' Day
- 6 October: International Geodiversity Day
- 10 October: World Mental Health Day
- 11 October: International Day of the Girl Child
- 13 October: International Day for Disaster Reduction
- 17 October: International Day for the Eradication of Poverty
- 24 October: United Nations Day
- 27 October: World Day for Audiovisual Heritage
November
- First Thursday: International Day Against Violence and Bullying at School, including Cyberbullying
- 2 November: International Day to End Impunity for Crimes against Journalists
- 3 November: International Day for Biosphere Reserves
- 5 November: World Day of Romani Language
- 5 November: World Tsunami Awareness Day
- 10 November: World Science Day for Peace and Development
- Third Thursday: World Philosophy Day
- 14 November: Children's Day (India) / International Day against Illicit Trafficking in Cultural Property
- 16 November: International Day for Tolerance
- 18 November: International Day of Islamic Art
- 19 November: International Men's Day
- 25 November: International Day for the Elimination of Violence against Women
- 26 November: World Olive Tree Day
- 29 November: International Day of Solidarity with the Palestinian People
December
- 1 December: World AIDS Day
- 2 December: World Futures Day
- 3 December: International Day of Persons with Disabilities
- 10 December: Human Rights Day
- 18 December: International Migrants Day
- 18 December: World Arabic Language Day
- 25 December: Christmas Day