How to set ALL default dates of my organization to DD-MM-YYYY format?

How to set ALL default dates of my organization to DD-MM-YYYY format?

All replies to this question comes from a time where the UI was different.

It's extremely frustrating not being able to find how to do this simple setting change.

I want everything and everyone in my organizations to have DD-MM-YYYY date format by default.

Can you help me please?