Автор: Zukero

procedure TfrmMain.ChangeDate(AFileName: string);
var
  i: TDate;
  H: Integer;
  f: TFileTime;
  s: TSystemTime;
begin
  H := CreateFile(PChar(AFileName), $0100, 0, nil, OPEN_EXISTING,
    FILE_FLAG_BACKUP_SEMANTICS, 0);

  i := Date;

  DateTimeToSystemTime(i, S);
  SystemTimeToFileTime(S, F);
  LocalFileTimeToFileTime(F, F);
  SetFileTime(H, @f, @f, @f);
  CloseHandle(H);
end;