Click on the gear symbol at the top right of the window and select Generelt and Spr?k og tidssone from the menu.
It is recommended to use the same language settings for OWA as the other applications in Microsoft 365, so activate Bruke Microsoft 365-innstillinger.
Optionally, you can set a different language for OWA (webmail) from the Language menu.
Under Spr?k, change from the language Norwegian Bokm?l (Norway) to English (United States) and it automatically also change the Date Format and Time.
Finish by clicking the Lagre button to activate the change.
Close the Settings window in OWA.