Both NSE and BSE have announced changes to their F&O contract expiry days.
NSE Circular Summary :
Contracts expiring on or before Aug 31, 2025 will continue to expire on Thursday.
Contracts expiring on or after Sept 1, 2025 will expire on Tuesday.
BSE Circular Summary:
Contracts expiring on or before Aug 31, 2025 – expiry remains unchanged.
Contracts expiring on or after Sept 1, 2025 – expiry moves to Thursday
NSE announcement 
: https://tinyurl.com/mr3ycd69
BSE announcement - : https://tinyurl.com/3a8