Teams Application on MacBook has the Work Week starting on a Tues - How can I change it to M-F.

Teams Application on MacBook has the Work Week starting on a Tues

Teams Web App displays Calendar correct Mon-Fri

Outlook Calendar (Application) is also fine, only the Teams Application displays Calendar as Tues-Mon

MS Teams Preferences does not show any Work Week settings.

Confused and irritated - Any ideas (apart from buy a Windows Laptop) appreciated.

Regards