Last 2 months

$date_query = array(
	array(
		'before' => array(
			'year'  => 2019,
			'month' => 4,
			'day'   => 13,
		),
		'after' => array(
			'year'  => 2019,
			'month' => 2,
			'day'   => 13,
		),
	),
);