not showing today's events

Is there a way to show all events on the calendar, even those that have past? https://stillpointcsd.org/events-calendar/

Yes, just modify the parameters for the calendar query with a filter hook:

function df_em_get_full_calendar_events_args($args) {
	$args['event_show_past_events'] =  true;
	return $args;
}
add_filter('em_get_full_calendar_events_args', 'df_em_get_full_calendar_events_args');