mage-eventpress/inc/template-prts/add_calender.php

<?php
if (!defined('ABSPATH')) {
    die;
} // Cannot access pages directly.

add_action('mep_event_add_calender', 'mep_ev_calender');
if (!function_exists('mep_ev_calender')) {
	function mep_ev_calender($event_id)
	{
?>
		<div class="calender-url">
			<?php
			/**
			 * Action Hook mep_before_add_calendar_button & mep_after_add_calendar_button
			 */
			do_action('mep_before_add_calendar_button');
				echo mep_add_to_google_calender_link($event_id);
			do_action('mep_after_add_calendar_button');
			?>
		</div>
<?php
	}
}