Event Meta Start Date
$meta_query = array( 'relation' => 'AND', array( 'key' => 'event_start_date', 'compare' => '>=', 'type' => 'DATE', ), );
$meta_query = array( 'relation' => 'AND', array( 'key' => 'event_start_date', 'compare' => '>=', 'type' => 'DATE', ), );