Important National and International Days

The International Day for the Preservation of the Ozone Layer is observed on September 16th. It commemorates the 1987 signing of the Montreal Protocol on Substances that Deplete the Ozone Layer, a landmark international environmental agreement to phase out ozone-depleting chemicals.

The International Day of Democracy is observed annually on September 15th. It was established by the United Nations in 2007 to promote and uphold the principles of democracy, encourage participation in democratic processes, and raise awareness about democratic governance worldwide.

The International Day of Peace is observed on September 21st. Established by the United Nations in 1981, it calls for a complete cessation of hostilities during the day and encourages all nations and people to commemorate peace through education and public awareness.

International Literacy Day is observed annually on September 8th. Proclaimed by UNESCO in 1965, it aims to highlight the importance of literacy to individuals, communities, and societies, and to promote global efforts to combat illiteracy and improve education access worldwide.

International Talk Like a Pirate Day is celebrated annually on September 19. This humorous holiday was created in 1995 by John Baur and Mark Summers and encourages people to speak in pirate vernacular. September 12, 21, and 30 are not associated with this observance.

World Rabies Day is observed annually on September 28th. It commemorates the death of Louis Pasteur, who developed the first rabies vaccine, and aims to raise awareness about rabies prevention and control, particularly in regions where the disease remains endemic and causes thousands of deaths annually.

World Suicide Prevention Day is observed on September 10th. Established by the International Association for Suicide Prevention and co-sponsored by the World Health Organization, it aims to raise awareness that suicide is preventable, provide education about suicide prevention, and reduce stigma around mental health issues.

World Tourism Day is observed annually on September 27, as designated by the United Nations World Tourism Organization to promote awareness of tourism's social, cultural, and economic importance. The date was chosen to mark the anniversary of the adoption of UNWTO statutes in 1970. September 12, 9, and 18 are incorrect.

World Suicide Prevention Day is observed annually on September 10, as established by the International Association for Suicide Prevention in conjunction with the World Health Organization. The day aims to raise awareness about suicide prevention and reduce stigma. September 25, 11, and 17 are not the correct dates.

Hindi Day (Hindi Diwas) is celebrated on September 14 (40070 in Excel date format) to commemorate the adoption of Hindi in Devanagari script as an official language of India in 1949. This date marks Hindi's constitutional status as India's official language.

Hindi Diwas (Hindi Day) is celebrated on September 14 every year to commemorate the adoption of Hindi in Devanagari script as one of the official languages of India by the Constituent Assembly of India in 1949.

Carnival occurs immediately before Lent, which means its timing depends on Easter's date. Since Easter can fall in March or April, Lent (and thus Carnival) can occur in February or March depending on the year. Rio's Carnival, for example, varies between these months.

National Science Day is celebrated in India on February 28 each year to commemorate the discovery of the Raman Effect by physicist C.V. Raman in 1928, for which he won the Nobel Prize.

Mother's Day is observed on the second Sunday of May in India. May 9, 2026 falls on the second Sunday, making it the correct date for that year. The date varies each year as it follows the Sunday rule.

Engineer's Day is observed in India on September 15 each year to honor the birth anniversary of Mokshagundam Visvesvaraya, a renowned Indian engineer and statesman. This day recognizes engineering excellence.