I use this i a theme:
$date_now = date('Y-m-d H:i:s');
// WP_Query arguments
$args = array(
'posts_per_page' => 3,
'post_type' => 'post',
'meta_query' => array(
array(
'key' => 'end_date',
'compare' => '>=',
'value' => $date_now,
'type' => 'DATETIME'
)
),
'order' => 'ASC',
'orderby' => 'date',
'meta_key' => 'end_date',
'meta_type' => 'DATE'
);
// The Query
$query = new WP_Query( $args );