filter_events_calendar.php

<?php
add_filter('avf_title_args', 'fix_events_page_title', 10, 2);
function fix_events_page_title($args,$id)
{
    if (get_query_var('post_type') == 'tribe_events' && !is_single())
    {
        if((tribe_is_upcoming() || tribe_is_past()))
        {
            $args['title'] = 'Events List';
        }
        else if(tribe_is_showing_all())
        {
            $args['title'] = 'List all events';
        }
        else
        {
            $args['title'] = 'Gridview';
        }
    }


    return $args;
}