date format in translation files

[Manfred62]

I'm nearly ready with the german translation for PW 2.7. I found 3 files where we didn't translated the date format until now. Normally the format for german is used as d.m.Y instead of Y-m-d. In this old thread it sounds like the format has to be in Y-m-d? Could someone clarify this?

InputfieldSelector.module

Y-m-d
date format

yyyy-mm-dd
date format placeholder (what users see)
==================
InputfieldPageTable.module

Y-m-d H:i
Date format for created/modified/published
==================
LanguageSupport.module

Y-m-d H:i:s
Sortable date format used in the admin