Featured events

$meta_query = array(
	array(
		'key'     => 'start',
		'value'   => '2000-01-01',
		'compare' => '>=',
		'type'    => 'DATE',
	),
	array(
		'key'     => 'end',
		'value'   => '2020-12-31',
		'compare' => '<=',
		'type'    => 'DATE',
	),
	array(
		'key'     => 'featured',
		'compare' => 'EXISTS',
	),
);