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There is a newer version: 1.12.1

Why is this an issue?

  A TFormatSettings argument can be provided to the TDate and
  TDateTime string formatting functions in System.SysUtils.
  If a TFormatSettings argument is not provided, then the global
  TFormatSettings will be used by default.


  Relying on the global TFormatSettings is problematic because it is populated with
  system default values from the OS, leading to different behavior on different machines.

Functions that accept a TFormatSettings argument include:

  System.SysUtils.DateToStr
  System.SysUtils.DateTimeToStr
  System.SysUtils.StrToDate
  System.SysUtils.StrToDateDef
  System.SysUtils.TryStrToDate
  System.SysUtils.StrToDateTime
  System.SysUtils.StrToDateTimeDef
  System.SysUtils.TryStrToDateTime

How to fix it

  Create a local TFormatSettings instance, configure it with the desired date
  formatting properties, and pass it in as the last parameter of the formatting routine.

procedure PrintCurrentTime;
begin
  Writeln(DateToStr(Now));
end;

procedure PrintCurrentTime;
var
  LocalFormatSettings: TFormatSettings;
begin
  LocalFormatSettings := TFormatSettings.Create;
  LocalFormatSettings.ShortDateFormat := 'dd/mm/yyyy';
  Writeln(DateToStr(Now), LocalFormatSettings);
end;

Resources

  
    
      RAD Studio API documentation: System.SysUtils.TFormatSettings