No TFormatSettings parameter any more in System.SysUtils date/time functions?

StrToDate() and the like functions no longer compile when adding FormatSettings parameter. Obviously, in Unit ...\Core Source\System.SysUtils.pas all date/time related functions usually having parameter FormatSettings have been commented out, like e.g.
// function DateToStr(Date: TDateTime; const FormatSettings: TFormatSettings): string;
Why is that and how to alternatively work with different date/time strings?

The pas2js RTL does not support this (yet)