"All weekly contracts shall expire on Wednesday of every week excluding the expiry week of the monthly contract. If Wednesday is a trading holiday, then the expiry day is the previous trading day," NSE said in a circular. For monthly and quarterly contracts of the widely-tracked banking index, there is no change and will continue to expire on the last Thursday of the expiry month.
The first Wednesday weekly expiry for Bank Nifty F&O contracts will be on September 6, 2023. However, there is no change in monthly expiry day for Bank Nifty contracts
The NSE has announced that starting from September 4, 2023, the weekly expiry day for Bank Nifty futures & options contracts will change to Wednesday from Thursday. Check the revised expiry dates for contracts: