meta_query1

$meta_query = array(
	'relation' => 'OR',
	array(
		'key'     => 'date_of_press_release',
		'compare' => '=',
		'type'    => 'DATE',
	),
	array(
		'key'     => 'pr_articles_feature_on_homepage',
		'value'   => 'true',
	),
);