Modifies the Event Espresso calendar query to include events that have not ended yet when show_expired=false is set

functions.php

<?php // remove if there's already an opening PHP tag in your funcitons.php file

add_filter ( 'filter_hook_espresso_calendar_sef_and_start_end_dates', 'my_custom_calendar_query_not_yet_ended' );

function my_custom_calendar_query_not_yet_ended() {
	// this will filter the query so events that have closed for registration, but haven't ended yet,
	// will display when show_expired is false
	$today = date( 'Y-m-d' );
	$sql = " AND e.end_date >= '$today' ";
	return $sql;
}