https://bugs.winehq.org/show_bug.cgi?id=47866
--- Comment #6 from Nikolay Sivov bunglehead@gmail.com --- Setting format is meant to override locale default. What's strange is that this changes actual window text. Normally any kind of reordering should only affect visual representation, not the storage.
Second test failing seems to be different, ar_EG date format should be DD/MM/YYYY as expected string shows, for some reason it's changed to YMD.