Eventi intorno e durante il mese

$meta_query = array(
	'relation' => 'OR',
	array(
		'relation' => 'AND',
		array(
			'key'     => 'evcal_srow',
			'value'   => '1575158400',
			'compare' => '>=',
		),
		array(
			'key'     => 'evcal_srow',
			'value'   => '1577750400',
			'compare' => '<=',
		),
	),
);