private function getNthDayOfMonth($curdate, $day_of_week, $week_of_month, $next_month_of_year)
{
$nextdate = $this->advanceDate($curdate, $next_month_of_year, 1);
// advance to correct month
$nextdate = TribeDateUtils::getFirstDayOfWeekInMonth($nextdate, $day_of_week);
if ($week_of_month == -1) {
// LAST WEEK
$nextdate = TribeDateUtils::getLastDayOfWeekInMonth($nextdate, $day_of_week);
return $nextdate;
} else {
$maybe_date = strtotime(date(DateSeriesRules::DATE_FORMAT, $nextdate) . " + " . ($week_of_month - 1) . " weeks");
// if this doesn't exist, then try next month
while (date('n', $maybe_date) != date('n', $nextdate)) {
// advance again
$next_month_of_year = $this->getNextMonthOfYear(date('n', $nextdate));
$nextdate = $this->advanceDate($nextdate, $next_month_of_year);
$nextdate = TribeDateUtils::getFirstDayOfWeekInMonth($curdate, $day_of_week);
$maybe_date = strtotime(date(DateSeriesRules::DATE_FORMAT, $nextdate) . " + " . ($week_of_month - 1) . " weeks");
}
return $maybe_date;
}
}
