Q:

FormatSettings.ShortDateFormat not the same as System Locale

I'm getting current format settings by doing:
 _FormatSettings := TFormatSettings.Create(GetThreadLocale);

My system short date format is dd.MM.yyyy but _FormatSettings.shorDateFormat is dd/MM/yyyy. Should I replace slashes with FormatSettings date separator or I am not aware of something else?
I'm using Windows 10 with latest updates.
My actual short date format is:

A:

No, you should not replace the slashes in TFormatSettings.ShortDateFormat. That could cripple the date formulation.
The '/' character in TFormatSettings.ShortDateFormat is a placeholder for the actual date separator character (TFormatSettings.DateSeparator), that will be inserted during formulation of a date string.
Ref. 
procedure DateTimeToString(var Result: string; const Format: string;
  DateTime: TDateTime; const AFormatSettings: TFormatSettings);
in System.SysUtils

