On 22 October 2026, the Pentagon authorised the Department of Homeland Security (DHS) to test an Active Denial System (ADS) for possible use along the US–Mexico border. A memo signed by US Defense Secretary Pete Hegseth in September 2026 permits DHS to borrow one unit for seven months, starting in September.
Millions of butterflies, including blue tigers, dark blue tigers and crow butterflies, are migrating from the Eastern Ghats towards the Western Ghats during the onset of the Northeast monsoon in October 2026. The movement across Tamil Nadu is linked to the seasonal rains and the availability of host plants in forests of the Western Ghats.
On 19 October 2026, the U.S. Food and Drug Administration (FDA) granted final approval to Zydus Lifesciences for its Abbreviated New Drug Application (ANDA) for Estradiol and Levonorgestrel Transdermal System, delivering 0.045 mg/0.015 mg per day. The FDA publicly announced the approval on 20 October 2026. The once-weekly patch is therapeutically equivalent to Bayer’s Climara Pro Transdermal System, the reference listed drug.
On 21 October 2026, Commerce and Industry Minister Piyush Goyal announced state-level outreach initiatives to help farmers, workers, women, youth, Micro, Small and Medium Enterprises (MSMEs), and small businesses use export opportunities under India’s Free Trade Agreements (FTAs). The Department of Commerce is organising the initiatives with state governments. India has nine FTAs covering 38 countries.
Two previously unknown subterranean fish species were discovered in wells in Assam’s Goalpara district. The species, “Gitchak nakana” and “Rakthamichthys anchi”, were announced by Assam’s Environment and Forests Minister Jayanta Malla Baruah on 21 October 2026.
Vummidi Ethiraj, a jeweller who played a key role in crafting the Sengol, died in Chennai on 21 October 2026 at the age of 99. Born on 25 November 1926, he was the patriarch of the Vummidi family, which owns Vummidi Bangaru Jewellers, a 125-year-old jewellery business.
The 7th Agrivoltaics World Conference began on 21 October 2026 at Bharat Mandapam in New Delhi and is scheduled to conclude on 23 October. India is hosting the global conference for the first time in the Global South. The Ministry of New and Renewable Energy (MNRE) is hosting the event, with support from Germany’s Federal Ministry for the Environment, Climate Action, Nature Conservation and Nuclear Safety and in partnership with Conexio-PSE.
The Central Government notified the Telecommunications (Regulatory Sandbox) Rules, 2026, on 22 October 2026. The rules came into force on 21 October 2026, the date of their publication in the Official Gazette. They provide a framework for eligible startups, companies, researchers and individuals to test telecom technologies, services and business models in a controlled regulatory environment.
Bangladesh and Nepal will co-host the third edition of the ICC Under-19 Women’s T20 World Cup from January 21 to February 6, 2027. The tournament will feature 16 teams and 41 matches across venues in both countries.
French health authorities confirmed the country’s first human case of Shamonda virus on 22 October 2026. The patient died after contracting the virus. Shamonda virus is an insect-borne virus primarily associated with livestock, particularly cattle, and is transmitted by biting midges.
The Ministry of Agriculture & Farmers Welfare will launch the nationwide Khet Bachao Abhiyan-Rabi 2026 on October 22, 2026. Union Agriculture and Farmers Welfare Minister Shivraj Singh Chouhan will launch the campaign from Karnal, Haryana. It is scheduled to run until November 30, 2026, and focuses on sustainable agriculture, soil health and judicious use of agricultural resources.
National Geographic released its annual “Best of the World 2027” list on 20 October 2026. The list features 25 destinations across six continents, including Jaipur, the capital of Rajasthan. Jaipur will mark 300 years since its foundation in 2027.