October 2026 carries some of the year's biggest observances: Gandhi Jayanti, World Teachers' Day, the ten-day Navratri and Dussehra festivities, World Mental Health Day, World Food Day, and United Nations Day. This guide lists every major national and international day in the month with its correct 2026 date and why it matters. It also flags one big surprise: Diwali is not in October this year. Because 2026 includes an Adhik Maas (an extra lunar month), the festival calendar has shifted later than usual, and Diwali 2026 actually falls on November 8. See the Date Corrections section for this and other floating dates that recycled lists tend to get wrong.
Complete List of Important Days in October 2026
The table below covers the month at a glance, including the day of the week, useful for planning school assemblies, office observances, or revision schedules.
| Date | Day | Observance | Category |
|---|---|---|---|
| Oct 1 | Thu | International Day of Older Persons | Social |
| Oct 1 | Thu | International Coffee Day | Miscellaneous |
| Oct 2 | Fri | Gandhi Jayanti | National |
| Oct 2 | Fri | International Day of Non-Violence | International |
| Oct 2 | Fri | Lal Bahadur Shastri Birth Anniversary (1904) | History |
| Oct 4 | Sun | World Animal Day | Wildlife |
| Oct 5 | Mon | World Teachers’ Day | Education |
| Oct 5 | Mon | World Habitat Day (1st Monday) | Environment |
| Oct 8 | Thu | Indian Air Force Day | Defence/National |
| Oct 9 | Fri | World Post Day | International |
| Oct 10 | Sat | World Migratory Bird Day (2nd Saturday) | Wildlife |
| Oct 10 | Sat | World Mental Health Day | Health |
| Oct 11 | Sun | International Day of the Girl Child | Social |
| Oct 11 | Sun | Jayaprakash Narayan Birth Anniversary (1902) | History |
| Oct 12 | Mon | Shardiya Navratri begins (Ghatasthapana) | Festival |
| Oct 12 | Mon | World Arthritis Day | Health |
| Oct 13 | Tue | International Day for Disaster Risk Reduction | International |
| Oct 14 | Wed | World Standards Day | International |
| Oct 15 | Thu | World Students’ Day (Dr. A. P. J. Abdul Kalam) | National |
| Oct 15 | Thu | Global Handwashing Day | Health |
| Oct 15 | Thu | International Day of Rural Women | Social |
| Oct 16 | Fri | World Food Day | International |
| Oct 17 | Sat | International Day for the Eradication of Poverty | Social |
| Oct 20 | Tue | Vijayadashami / Dussehra | Festival |
| Oct 20 | Tue | World Osteoporosis Day | Health |
| Oct 21 | Wed | Police Commemoration Day (India) | National/Defence |
| Oct 24 | Sat | United Nations Day | International |
| Oct 24 | Sat | World Polio Day | Health |
| Oct 24 | Sat | World Development Information Day | International |
| Oct 25–26 | Sun–Mon | Sharad Purnima / Valmiki Jayanti | Festival |
| Oct 27 | Tue | World Day for Audiovisual Heritage | International |
| Oct 29 | Thu | Karva Chauth | Festival |
| Oct 30 | Fri | World Thrift Day | Economy |
| Oct 31 | Sat | National Unity Day (Rashtriya Ekta Diwas) | National |
| Oct 31 | Sat | World Cities Day | International |
National Important Days in October 2026 (India)
- Oct 2, Gandhi Jayanti: marks the birth anniversary of Mahatma Gandhi (1869) and is also the birth anniversary of former PM Lal Bahadur Shastri.
- Oct 5, World Teachers’ Day: UNESCO's global counterpart to India's own September 5 Teachers’ Day, recognising the role of educators worldwide.
- Oct 8, Indian Air Force Day: marks the founding of the Indian Air Force in 1932; air shows and flypasts are typically held at IAF stations.
- Oct 15, World Students’ Day: observed on the birth anniversary of Dr. A. P. J. Abdul Kalam, India's former President and the "Missile Man of India."
- Oct 21, Police Commemoration Day: honours police personnel who lost their lives in the line of duty, tracing back to the 1959 Hot Springs clash in Ladakh.
- Oct 31, National Unity Day: celebrates the birth anniversary of Sardar Vallabhbhai Patel (1875), architect of India's political integration, and is marked with the Run for Unity across the country.
International & UN Observance Days in October 2026
- Oct 2, International Day of Non-Violence: the UN's tribute to Gandhi's philosophy of non-violent resistance.
- Oct 10, World Mental Health Day: promotes mental health awareness and reduces stigma around mental illness worldwide.
- Oct 11, International Day of the Girl Child: highlights the rights, challenges and potential of girls globally, established by the UN in 2012.
- Oct 16, World Food Day: marks the founding of the UN Food and Agriculture Organization (FAO) in 1945 and draws attention to global hunger and food security.
- Oct 24, United Nations Day: commemorates the day the UN Charter came into force in 1945, alongside World Polio Day and World Development Information Day.
- Oct 31, World Cities Day: a UN observance since 2014 focused on sustainable urban development.
Festivals in October 2026
| Festival | 2026 Date | Notes |
|---|---|---|
| Shardiya Navratri (Ghatasthapana) | Monday, Oct 12 | Nine nights dedicated to the nine forms of Goddess Durga. |
| Vijayadashami / Dussehra | Tuesday, Oct 20 | Marks Lord Rama's victory over Ravana; effigies of Ravana are burned across North India. |
| Sharad Purnima / Valmiki Jayanti | Oct 25 to 26 | Full-moon festival of the Ashwin month; Panchangs differ slightly on the exact day this year. |
| Karva Chauth | Thursday, Oct 29 | A day-long fast observed by married women, broken after moonrise. |
Key Days of October 2026, Explained
Gandhi Jayanti: October 2
India observes the birth anniversary of Mahatma Gandhi as a national holiday, with prayer meetings, tributes at Raj Ghat, and cleanliness drives under the Swachh Bharat mission. The United Nations separately marks the same date as the International Day of Non-Violence, adopted by the General Assembly in 2007 in recognition of Gandhi's principle of Ahimsa.
World Teachers’ Day: October 5
Established by UNESCO in 1994, this day commemorates the adoption of the 1966 ILO/UNESCO Recommendation on the Status of Teachers. It highlights the working conditions and professional standing of teachers as a distinct observance from India's own Teachers’ Day on September 5.
World Habitat Day: October 5
Held on the first Monday of October, this UN-Habitat day reflects on the state of towns and cities and the basic right to adequate shelter. The 2026 theme is “Adequate Housing for All,” spotlighting the global housing crisis that leaves an estimated 2.8 billion people facing some form of housing inadequacy.
World Mental Health Day: October 10
Founded by the World Federation for Mental Health in 1992, this day raises awareness of mental health issues and mobilises support for prevention and treatment. Schools, workplaces and health bodies typically run screening camps and awareness drives around this date.
Navratri and Dussehra: October 12 to 20
Shardiya Navratri begins with Ghatasthapana on Monday, October 12, and spans nine nights of worship dedicated to the Navadurga, the nine forms of Goddess Durga. The festival closes with Vijayadashami, popularly known as Dussehra, on Tuesday, October 20, commemorating Lord Rama's victory over Ravana and Goddess Durga's victory over the demon Mahishasura.
World Food Day: October 16
Marking the 1945 founding of the UN Food and Agriculture Organization, World Food Day draws global attention to hunger, malnutrition and sustainable agriculture, with events coordinated in over 150 countries.
United Nations Day: October 24
This day marks the anniversary of the UN Charter's entry into force in 1945, following ratification by a majority of its founding members. It is observed alongside World Polio Day, which raises funds and awareness for global polio eradication efforts led by Rotary International and the WHO.
National Unity Day: October 31
India marks the birth anniversary of Sardar Vallabhbhai Patel, the first Deputy Prime Minister and Home Minister, credited with the political integration of over 560 princely states into the Indian Union after independence. The Statue of Unity in Gujarat, the world's tallest statue, is dedicated to him.
Date Corrections: What Other “Important Days” Lists Get Wrong for 2026
Several October observances follow a rule (“first Monday,” “second Saturday”) or a lunar-calendar date rather than a fixed one, so the exact day changes every year. Checked against the real October 2026 calendar and Hindu Panchang:
- Diwali is not in October 2026 at all. Because of the Adhik Maas (extra lunar month) running from May 17 to June 15, 2026, the entire post-monsoon festival calendar has shifted about three weeks later than usual. Diwali 2026 falls on Sunday, November 8, with Dhanteras around November 5 to 6. Any October 2026 list that includes Diwali has not accounted for this leap month.
- World Habitat Day is the first Monday of October. In 2026 that is October 5, not October 6, which a number of recycled calendar pages state (October 6, 2026 is a Tuesday).
- World Migratory Bird Day's October leg falls on the second Saturday of the month, correctly October 10, 2026.
- World Statistics Day is fixed at October 20, but it is only an official UN observance once every five years (2010, 2015, 2020, 2025, then 2026). 2026 is not one of those years, even though some sites list it as an annual event.
Frequently Asked Questions
What are the important days in October 2026?
October 2026 includes Gandhi Jayanti and International Day of Non-Violence (Oct 2), World Animal Day (Oct 4), World Teachers’ Day and World Habitat Day (Oct 5), Indian Air Force Day (Oct 8), World Post Day (Oct 9), World Mental Health Day (Oct 10), International Day of the Girl Child (Oct 11), Navratri (from Oct 12), World Food Day (Oct 16), Vijayadashami/Dussehra and World Osteoporosis Day (Oct 20), United Nations Day and World Polio Day (Oct 24), Karva Chauth (Oct 29), and National Unity Day (Oct 31).
Is Diwali in October 2026?
No. Diwali 2026 falls on Sunday, November 8, not in October. 2026's Adhik Maas (an extra lunar month from May 17 to June 15) pushes Diwali and related festivals nearly 20 days later than the usual year-on-year drift. Any list showing Diwali in October 2026 has missed this leap month.
When is Gandhi Jayanti 2026?
Friday, October 2, 2026, marking Mahatma Gandhi's birth anniversary and observed by the UN as the International Day of Non-Violence.
When does Navratri 2026 start and when is Dussehra?
Shardiya Navratri 2026 begins with Ghatasthapana on Monday, October 12, and concludes with Vijayadashami (Dussehra) on Tuesday, October 20, 2026.
Is World Habitat Day 2026 on 5 or 6 October?
It's October 5, 2026, the first Monday of the month. October 6, 2026 is a Tuesday, so any list citing that date hasn't recalculated the rule for this year.
When is Karva Chauth 2026?
Thursday, October 29, 2026. Moonrise, used to break the fast, is around 8:12 to 8:18 PM depending on the city.
Is World Statistics Day observed every year on October 20?
The date is fixed, but the UN only holds an official World Statistics Day once every five years, in 2010, 2015, 2020 and 2025, with the next in 2030. So October 20, 2026 is not an official UN observance year, even though some sites list it as annual.
When is World Mental Health Day 2026?
Saturday, October 10, 2026, a fixed annual date established by the World Federation for Mental Health.
When is United Nations Day 2026?
Saturday, October 24, 2026, marking the anniversary of the UN Charter's entry into force in 1945. World Polio Day and World Development Information Day are observed the same day.
When is National Unity Day 2026?
Saturday, October 31, 2026, the birth anniversary of Sardar Vallabhbhai Patel (1875). The UN's World Cities Day is also observed on this date.