September 30 has a significant place in Indian history, with important events in politics, society, cinema, literature and disaster history. The date is particularly remembered for the 1993 Latur earthquake, one of the most devastating earthquakes in Maharashtra's history.

September 30 is also associated with the birth anniversaries of several notable Indians, including filmmaker Hrishikesh Mukherjee, singer Shaan, athlete Deepa Malik and jurist M. C. Chagla.
One of the most important events associated with September 30 is the Latur or Killari earthquake of 1993. The earthquake struck Maharashtra in the early hours of September 30, 1993, affecting Latur, Osmanabad and surrounding areas. Maharashtra's Groundwater Surveys and Development Agency identifies September 30, 1993, as the date of the major Killari earthquake.
The earthquake caused extensive destruction across villages in the region. Government and disaster-management sources note that thousands of people lost their lives and many more were injured. The disaster also highlighted the importance of earthquake-resistant construction and preparedness in areas that were not traditionally considered highly earthquake-prone.
Historical records also associate September 30, 1687, with Mughal emperor Aurangzeb's capture of the famous Golconda Fort from the Qutb Shahi kingdom. The event marked a significant stage in the Mughal expansion in the Deccan.
Several prominent Indians were born on September 30. They include:
September 30 is also the birth anniversary of several political and public figures, including Rangnath Ramchandra Diwakar, a Gandhian leader and politician; M. C. Chagla, who later served as a Union minister; and Mahesh Sharma, an Indian politician born in 1959.
A number of Indian cricketers share their birthday on September 30. They include:
September 30 is also remembered for the death anniversaries of several notable Indians. Ramananda Chatterjee, a pioneering Indian journalist, died on September 30, 1943. Sumitra Kumari Sinha, an Indian poet and writer, died on the same date in 1994. Former Union minister and Congress leader Madhavrao Scindia died on September 30, 2001, while former Haryana Chief Minister Rao Virendra Singh died on September 30, 2009.
September 30 is observed as International Translation Day by the United Nations. The UN General Assembly declared September 30 as International Translation Day through Resolution 71/288 in 2017. The day recognises the contribution of translators, interpreters and other language professionals in promoting communication, understanding and cooperation among countries and communities.
September 30 brings together several aspects of Indian history, from the devastating Latur earthquake and historical events in the Deccan to the birth anniversaries of influential personalities from cinema, politics, sports and public life. The date also has international significance through International Translation Day, highlighting the role of language professionals in connecting people across linguistic and cultural boundaries.