Custom Event Time Placeholder

add_filter('em_event_output_placeholder','my_em_placeholder_eventtime',100,3);
function my_em_placeholder_eventtime($replace, $EM_Event, $result){
    if ( $result == '#_EVENTTIMECUSTOM' ) {
        $time_format1 = "g:i a";
        $time_format2 = "g:i a T";
        $time_separator = "-";
        $replace = $EM_Event->start()->copy()->setTimezone()->i18n($time_format1). $time_separator . $EM_Event->end()->copy()->setTimezone()->i18n($time_format2);
    }
    return $replace;
}