function subtest($date_span)
{
    $printable = new DateFormatHuman($date_span);
    print $date_span;
    print "<br>_______________________";
    print $printable->formatHuman();
    print "<br>";
}
function present_dates_as_language_admin($args)
{
    $printable = new DateFormatHuman($args);
    return $printable->formatHuman() . " (" . $args . ")";
}
function present_dates_as_language($args)
{
    $printable = new DateFormatHuman($args);
    return strtolower($printable->formatHuman());
}