Collabora locale date format

Hi all,

I have set my nextcloud to german, also the locale to german. The interface is displayed in german, also in collabora it is german.

Still my columns of Excel sheets are displayed in US month/day/year.
When I open the document on my local computer the date is displayed correctly.

Any clues?

I think you get better answers in Collabora forum!
Sounds similar to Default locale for calc date format - Installation & Configuration - Collabora Online