Exhibition

$meta_query = array(
	'relation' => 'AND',
	array(
		'key'     => 'exhibition_start_date',
		'value'   => 'meta_value',
		'compare' => '=',
		'type'    => 'CHAR',
	),
	array(
		'key'     => 'exhibition_month',
		'value'   => 'meta_value',
		'compare' => '=',
		'type'    => 'CHAR',
	),
	array(
		'key'     => 'exhibition_year',
		'value'   => 'meta_value',
		'compare' => '=',
		'type'    => 'CHAR',
	),
);