Hello, are you connected to a VPN or using location services on your device?
Open Settings > Time & language > Date & time, turn off Set time zone automatically, then manually select your correct time zone from the list. Next go to Settings > Privacy & security > Location, turn on Location services, and click Set default under default location to choose your region. After that, restart your PC and avoid turning the automatic time zone back on unless your location is detected correctly, this ensures Windows uses your chosen region instead of detecting the wrong one.