Override iCal Importer's default timeout (5 seconds) for feed parsing

functions.php

<?php
/**
	* From https://gist.github.com/cliffordp/35dbf3ca36c57949228bf6ded23d62bf
	* 
	* Override iCal Importer's default timeout (5 seconds) for feed parsing
	**/
add_filter( 'tribe_events_ical_importer_connection_timeout', 'cliff_ical_importer_custom_timeout_in_seconds' );
function cliff_ical_importer_custom_timeout_in_seconds() {
	return 10; // integer number of seconds
}