Group 1 - Major banks in India, including the State Bank of India (SBI), will observe holidays this weekend as per the Reserve Bank of India (RBI) calendar [2][3] - The specific closures include September 27-28 for the fourth Saturday and Sunday, and September 29 for a holiday in Agartala, Kolkata, and Guwahati for Maha Saptami [2][3] - On September 30, banks in several cities including Agartala, Bhubaneswar, and Kolkata will remain closed for Maha Ashtami/Durga Ashtami [2][3] Group 2 - Not all branches will be closed on every holiday date, as closures can vary by state, and customers are advised to check with their local branch [2][3] - Online banking services remain accessible even when branches are closed, allowing customers to use ATMs, mobile apps, and internet banking for various transactions [2][3] - Services requiring in-person visits, such as bulk cash deposits and demand drafts, will not be available on these holidays, prompting residents and businesses to plan transactions in advance [2][3]