September 16 is an important date in Indian and world history. The day is remembered for significant developments in India's freedom movement, banking and public administration, along with the birth anniversaries of celebrated personalities from music, science, politics, cinema and literature.

Globally, September 16 is observed as the International Day for the Preservation of the Ozone Layer, popularly known as World Ozone Day. In 2026, the global observance focuses on protecting the ozone layer while promoting sustainable cooling and climate action.
One notable event associated with September 16 occurred in 1913, when Kasturba Gandhi was arrested during India's freedom struggle. Her participation in the national movement reflected the important role played by women in India's fight against British rule.
Another significant episode took place at the Hijli Detention Camp in 1931, where political prisoners Tarkeshwar Dutta and Santosh Mitra were shot by a British officer. The incident became one of the important episodes associated with the repression of political prisoners during the freedom movement.
September 16 is also significant in India's economic history. In 1982, Manmohan Singh took charge as the Governor of the Reserve Bank of India. He later became India's Prime Minister and remains one of the country's best-known economists and political leaders.
One of India's most celebrated classical singers, Madurai Shanmukhavadivu Subbulakshmi, was born on September 16, 1916, in Madurai.
Widely known as M. S. Subbulakshmi, she became an iconic exponent of Carnatic music and received several prestigious honours, including the Bharat Ratna. Her performances helped introduce Indian classical music to audiences across the world. Government publications record her birth date as September 16, 1916, and her death on December 11, 2004.
Several prominent Indians from different fields were born on this date.
September 16 is also the birth anniversary of notable political personalities.
P. Chidambaram, born on September 16, 1945, is a veteran Indian politician and former Union minister. He has represented Tamil Nadu in Parliament and has held important portfolios, including Finance and Home Affairs.
S. S. Ramasami Padayatchiyar, born on September 16, 1918, was a Tamil Nadu politician and founder of the Tamil Nadu Toilers' Party. He later served as a Member of Parliament.
Other Indian political and public figures associated with September 16 include J. Radhakrishnan, an Indian civil servant, and several regional political personalities.
Several Indian cricketers and cricket personalities were born on September 16.
Pramila Bhatt, born in 1969, represented India in women's cricket and was an important figure in the early development of women's cricket in the country.
Ashish Zaidi, born in 1971, is another Indian cricketer associated with this date.
Other Indian players born on September 16 include Pavan Deshpande (1989), Ashish Sinha (1990), Sayan Ghosh (1992), Sylvester Mylliempdah (1992), Pritam Chakraborty (1994) and Harpreet Brar (1995).
September 16 is also associated with the death anniversaries of several notable Indians.
Marshal of the Indian Air Force Arjan Singh died on September 16, 2017. He was one of India's most distinguished military leaders and served as Chief of the Air Staff during the 1965 India-Pakistan War.
Gita Mehta, the acclaimed Indian writer and filmmaker, died on September 16, 2023. She was known for works that explored Indian society, culture and politics.
The date also marks the death anniversary of Guru Amar Das, the third Sikh Guru, who passed away on September 16, 1574.
The most important global observance on September 16 is the International Day for the Preservation of the Ozone Layer. The United Nations designated the date to commemorate the signing of the Montreal Protocol in 1987, an international agreement aimed at protecting the ozone layer by phasing out ozone-depleting substances.
For World Ozone Day 2026, the theme is "Global Action for a Cooler Planet". The year also marks 10 years of the Kigali Amendment, which strengthened international efforts to phase down hydrofluorocarbons (HFCs).
September 16 brings together important chapters from India's freedom struggle, politics, science, music and sports. The day recalls Kasturba Gandhi's role in the freedom movement, the Hijli detention camp incident, the appointment of Manmohan Singh as RBI Governor, and the birth anniversaries of personalities such as M. S. Subbulakshmi, E. C. G. Sudarshan and Prasoon Joshi.
For students and competitive-exam aspirants, the key facts to remember are M. S. Subbulakshmi's birth anniversary, Manmohan Singh's appointment as RBI Governor in 1982, International Ozone Day and the Montreal Protocol of 1987. The date therefore carries importance across Indian history, culture, science, environment and public life.