October 3 has witnessed several important events in Indian political, social, cultural and sporting history. The date is associated with the formation of the Republican Party of India in 1957, the arrest of former Prime Minister Indira Gandhi in 1977, and Indian sporting achievements such as Geet Sethi's World Professional Billiards Championship victory in 1992.

October 3 is also the birth anniversary of several prominent Indians, including jurist Dipak Misra, filmmaker J. P. Dutta, actor Sathyaraj and cricketer K. S. Bharat.
Republican Party of India Founded in 1957
The Republican Party of India (RPI) came into existence on October 3, 1957. The party emerged from political organisations associated with the legacy of Dr B. R. Ambedkar. N. Sivaraj served as its first president. The formation became an important development in post-Independence political history, particularly in the representation of historically marginalised communities.
On October 3, 1977, former Prime Minister Indira Gandhi was arrested after allegations relating to the period of the Emergency. The arrest occurred after the Janata Party government came to power following the 1977 general election. The episode became part of the political developments that followed the Emergency period.
Indian cueist Geet Sethi achieved a major sporting milestone on October 3, 1992, when he won the World Professional Billiards Championship. He also recorded a world-record English billiards break of 1,276 under the three-pot rule. His achievement added to India's international reputation in cue sports.
Several notable Indians were born on October 3:
October 3 is the birth anniversary of several Indian political figures. Preneet Kaur, born in 1944, served as a Union minister and represented Patiala in Parliament. Hitendra Vishnu Thakur, born in 1961, is a Maharashtra politician. Gajendra Singh Shekhawat, born in 1967, has served in the Union government. Jurist Dipak Misra, born in 1953, later became the Chief Justice of India.
Indian cricket has several players born on this date. Kona Srikar Bharat, born on October 3, 1993, is an Indian wicketkeeper-batter from Visakhapatnam who has represented India in Test cricket.
Other Indian cricketers born on October 3 include Akshay Wakhare, Gagandeep Singh and Surya Prakash Rao.
October 3 is remembered for the death anniversaries of several notable Indians. Kadambini Ganguly, one of India's pioneering women physicians and among the country's first female graduates, died on October 3, 1923. Alladi Krishnaswamy Iyer, a prominent lawyer and member of the Constituent Assembly, died on October 3, 1953. Writer and critic M. N. Vijayan died on October 3, 2007.
There is no major United Nations international day fixed specifically for October 3 in the UN's official annual observance calendar. The UN calendar places World Habitat Day on the first Monday of October; in 2026, it falls on October 5 under the theme "Adequate Housing for All."
October 3 brings together important chapters from India's political, cultural and sporting history. The formation of the Republican Party of India, the political developments surrounding Indira Gandhi's 1977 arrest and Geet Sethi's 1992 world billiards victory make the date historically significant. The birthdays of personalities from politics, cinema, law and cricket further add to its importance. October 3 also serves as a useful date for remembering pioneering Indians such as Kadambini Ganguly and Alladi Krishnaswamy Iyer.