Thank you but it does not work, I'll look for documentation or a tutorial, hints are welcome.
edit:
I saw now that you edited your post, I'll try it again with the edited post.
edit 2:
I tried your first formular and it's not working, it results in an empty display.
edit 3:
It works with a simplified formular:
$Date(<Date Added>,dd.MM.yyyy)
Thanks for the help, have a good day.