Change Outlook Calendar Language To English. Open outlook and log in. To change the display language in outlook:

In the “choose editing languages” section, click on the “set language preferences” button. Modify the language of the default mailbox folders.
On The Review Tab, In The Language Group, Click Language.
If the name of the calendar folder itself is in a different language than outlook’s language see:
In The Language Dialog Box, Select.
Under date & time, select additional date, time, & regional settings.
(See Screenshot Below) 3 In Settings, Click/Tap On General In The Left.
Images References :
Under Date &Amp; Time, Select Additional Date, Time, &Amp; Regional Settings.
Open outlook and log in.
Select Show Week Numbers In The Date Navigator If You Want.
Set format style to english.
The Article Provides A Tutorial On How To Alter The Language, Date, And Time Format In The New Outlook App On Windows.