This can be used in formating date if the given format is smarty specific

date_formater.php

<?php

    public function formatDate($date, $dateFormat='', $timeFormat='')
    {
        $_dateMap  = array ( '%B %e, %Y'=> 'F d, Y',
                        '%A, %B %e, %Y' =>  'l  F d, Y',
                        '%m/%d/%Y' 		=>'m/d/Y',
                        '%d/%m/%Y' 		=> 'd/m/Y'
                        );

        $_timeMap = array(
                        '%I:%M %p' => 'h:i A',
                        '%l:%I %p' => 'g:i A',
                        '%H:%M'	   => 'H:i'
                        );
        
        $phpDateFormat   = (isset($_dateMap[$dateFormat])) ? $_dateMap[$dateFormat] : '';
        $phpTimeFormat   = (isset($_timeMap[$timeFormat])) ? $_timeMap[$timeFormat] : '';
        $format   =  $phpDateFormat . ' ' . $phpTimeFormat;
        if($format){
            $date  = new DateTime($date);
            return $date->format($format);
        }
        else{
            return $date;
        }
    }