Modify Date Format in Display Posts Shortcode plugin

gistfile1.aw

<?php
/**
 * Modify Date Format in Display Posts Shortcode plugin
 * @author Bill Erickson
 * @link http://wordpress.org/extend/plugins/display-posts-shortcode/
 * @link http://wordpress.org/support/topic/plugin-display-posts-shortcode-show-date-in-format-dmy
 *
 * @param $output string, the original markup for an individual post
 * @param $atts array, all the attributes passed to the shortcode
 * @param $image string, the image part of the output
 * @param $title string, the title part of the output
 * @param $date string, the date part of the output
 * @param $excerpt string, the excerpt part of the output
 * @param $inner_wrapper string, what html element to wrap each post in (default is li)
 * @return $output string, the modified markup for an individual post
 */
 
add_filter( 'display_posts_shortcode_output', 'be_display_posts_date', 10, 7 );
function be_display_posts_date( $output, $atts, $image, $title, $date, $excerpt, $inner_wrapper ) {

	// Change the date
	if ( $atts['include_date'] ) $date = ' <span class="date">('. get_the_date('j/n/Y') .')</span>';
	else $date = '';		

	// Now let's rebuild the output. 
	$output = '<' . $inner_wrapper . ' class="listing-item">' . $image . $title . $date . $excerpt . '</' . $inner_wrapper . '>';
	
	// Finally we'll return the modified output
	return $output;
}