/** * Returns number of days to start of this week. * * @author =stid= <*****@*****.**> * * @param string $date * @param string $first_day Optional. Start from `monday` * * @return int */ public static function beginningOfWeek($date, $first_day = 'monday') { $days_to_start = WPDKDateTime::daysToWeekStart($date, $first_day); return $date - $days_to_start; }