List of important days and dates during September 2025 : With National and International importance.

September 1-7: National Nutrition Week (India) Observed annually since 1982, this week aims to raise public awareness about the importance of nutrition for health and well-being. It emphasizes healthy eating habits, balanced diets, and addressing malnutrition across all age groups, promoting a healthier nation.

September 2: World Coconut Day Celebrated since 2009 by the Asian and Pacific Coconut Community (APCC), this day highlights the significance of coconuts in food, health, and economy. It raises awareness about the sustainable cultivation of coconut and its various uses, benefiting millions globally.

September 5: Onam (Kerala, India) A major harvest festival celebrated primarily in Kerala, Onam marks the homecoming of the mythical King Mahabali and is also associated with the Vamana avatar of Vishnu. Celebrated over several days, it involves elaborate feasts (Onasadya), traditional dances, boat races, and vibrant flower carpets (Pookkalam).

September 5: Teachers' Day (India) Celebrated annually since 1962, this day commemorates the birth anniversary of Dr. Sarvepalli Radhakrishnan, India's second President and a revered scholar and teacher. It's a day to honor and appreciate the contributions of teachers in shaping lives and building society.

September 5: Milad-un-Nabi/Eid-e-Milad (Tentative) This auspicious day marks the birth anniversary of Prophet Muhammad, the founder of Islam. Celebrated by Muslims worldwide, it involves prayers, discussions about the Prophet's life and teachings, and charitable acts. The exact date is based on the lunar Islamic calendar and may vary by a day.

September 8: International Literacy Day Proclaimed by UNESCO in 1966, this day raises awareness and promotes literacy as a matter of human rights and a foundation for lifelong learning. It highlights the importance of literacy for individual empowerment and sustainable development. The theme for 2025 will be announced by UNESCO.

September 10: World Suicide Prevention Day Organized by the International Association for Suicide Prevention (IASP) and co-sponsored by WHO since 2003, this day aims to raise awareness that suicide is preventable. It promotes understanding, offers hope to those affected, and encourages support for mental health.

September 14: Hindi Diwas (India) Celebrated annually since 1953, this day commemorates the adoption of Hindi as one of the official languages of the Union of India in 1949. It promotes the use and propagation of Hindi language and celebrates its rich literary heritage.

September 15: Engineer's Day (India) Observed annually in India since 1968, this day commemorates the birth anniversary of Bharat Ratna Sir M. Visvesvaraya, a renowned Indian engineer and statesman. It recognizes the vital contributions of engineers to the development and progress of the nation.

September 15: International Day of Democracy Established by the UN General Assembly in 2007, this day promotes and upholds the principles of democracy worldwide. It provides an opportunity to review the state of democracy in the world and advocate for human rights, rule of law, and free and fair elections.

September 16: World Ozone Day / International Day for the Preservation of the Ozone Layer Designated by the UN General Assembly in 1994, this day commemorates the signing of the Montreal Protocol in 1987, which aimed to protect the ozone layer. It raises awareness about the importance of safeguarding the ozone layer for life on Earth.

September 17: Vishwakarma Puja (India) A Hindu festival celebrated primarily in Eastern India, particularly by engineers, artisans, and factory workers. It honors Lord Vishwakarma, the divine architect and engineer of the universe, seeking his blessings for prosperity, safety, and productivity in their professions.

September 21: International Day of Peace Established by the UN General Assembly in 1981, this day is devoted to strengthening the ideals of peace, both within and among all nations and peoples. It encourages a 24-hour period of non-violence and cease-fire globally. The 2025 theme will be announced by the UN.

September 21: World Alzheimer's Day Observed globally since 1994, this day raises awareness and challenges the stigma surrounding Alzheimer's disease and dementia. It promotes research, support for caregivers, and early diagnosis to improve the lives of those affected.

September 22: World Rhino Day Initiated by the World Wide Fund for Nature (WWF) in South Africa in 2010, this day raises awareness about the critical need to protect all five species of rhinoceros from poaching and habitat loss. It advocates for conservation efforts worldwide.

September 22: First Day of Sharad Navratri (Begins) A major Hindu festival spanning nine nights, Navratri is dedicated to the worship of the Hindu deity Durga and her nine forms. It involves fasting, prayers, traditional dances like Garba and Dandiya, and culminates in Dussehra.

September 27: World Tourism Day Designated by the UN World Tourism Organization (UNWTO) in 1980, this day highlights the importance of tourism for cultural, social, political, and economic values globally. It raises awareness about tourism's potential to foster understanding and peace.

September 28: World Rabies Day Observed annually since 2007, this day raises awareness about the impact of rabies on humans and animals, and its prevention. It commemorates the death anniversary of Louis Pasteur, who developed the first effective rabies vaccine.

September 29: World Heart Day Launched in 2000 by the World Heart Federation, this day raises awareness about cardiovascular diseases (CVDs), including heart disease and stroke, and promotes preventive measures. It encourages healthy lifestyle choices to reduce the risk of heart-related ailments.