FECHA Y HORA

$meta_query = array(
	'relation' => 'AND',
	array(
		'key'     => 'hora',
		'value'   => '$hoy',
		'compare' => '>=',
		'type'    => 'DATE',
	),
	array(
		'key'     => 'hora',
		'compare' => 'EXISTS',
		'type'    => 'DATE',
	),
);