date_query

Verificar se funciona

$date_query = array(
	array(
		'key'     => 'start',
		'value'   => '10/02/2012',
		'compare' => '>=',
		'type'    => 'DATE',
	),
	array(
		'key'     => 'end',
		'value'   => '11/02/2012',
		'compare' => '<',
		'type'    => 'DATE',
	),
);