January
- January 1: New Year’s Day
- January 12: National Youth Day (India) – Birth anniversary of Swami Vivekananda
- January 15: Army Day (India)
- January 26: Republic Day (India)
- January 30: Martyrs’ Day (India) – Death anniversary of Mahatma Gandhi
February
- February 4: World Cancer Day
- February 13: World Radio Day
- February 14: Valentine’s Day
- February 21: International Mother Language Day
- February 28: National Science Day (India) – To mark the discovery of the Raman Effect by C.V. Raman
March
- March 8: International Women’s Day
- March 14: Pi Day (Mathematics)
- March 15: World Consumer Rights Day
- March 20: International Day of Happiness
- March 22: World Water Day
- March 23: World Meteorological Day
- March 24: World Tuberculosis (TB) Day
April
- April 2: World Autism Awareness Day
- April 7: World Health Day
- April 22: Earth Day
- April 23: World Book and Copyright Day
May
- May 1: International Labour Day (May Day)
- May 3: World Press Freedom Day
- May 8: World Red Cross Day
- May 11: National Technology Day (India)
- May 15: International Day of Families
- May 31: World No Tobacco Day
June
- June 5: World Environment Day
- June 8: World Oceans Day
- June 14: World Blood Donor Day
- June 21: International Yoga Day
- June 26: International Day against Drug Abuse and Illicit Trafficking
July
- July 1: National Doctor’s Day (India)
- July 11: World Population Day
- July 18: Nelson Mandela International Day
- July 26: Kargil Vijay Diwas (India) – Victory Day to honor Kargil War heroes
August
- August 6: Hiroshima Day
- August 9: International Day of the World’s Indigenous Peoples
- August 12: International Youth Day
- August 15: Independence Day (India)
- August 19: World Humanitarian Day
- August 29: National Sports Day (India) – Birth anniversary of hockey player Major Dhyan Chand
September
- September 5: Teacher’s Day (India) – Birth anniversary of Dr. Sarvepalli Radhakrishnan
- September 8: International Literacy Day
- September 14: Hindi Diwas (India)
- September 16: International Day for the Preservation of the Ozone Layer
- September 21: International Day of Peace
- September 27: World Tourism Day
October
- October 1: International Day of Older Persons
- October 2: Gandhi Jayanti (India) – Birth anniversary of Mahatma Gandhi
- October 10: World Mental Health Day
- October 16: World Food Day
- October 24: United Nations Day
November
- November 10: World Science Day for Peace and Development
- November 14: Children’s Day (India) – Birth anniversary of Jawaharlal Nehru
- November 19: International Men’s Day
- November 26: Constitution Day (India)
December
- December 1: World AIDS Day
- December 10: Human Rights Day
- December 16: Vijay Diwas (India) – Marks victory over Pakistan in 1971 war
- December 25: Christmas Day