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query_mes_ano

$meta_query = array(
	'relation' => 'AND',
	array(
		'key'     => 'month',
		'value'   => '09',
		'compare' => 'IN',
	),
	array(
		'key'     => 'ano',
		'value'   => '2019',
		'compare' => 'IN',
	),
);