cpr-actmeta
$act_metaquery = array( 'relation' => 'AND', array( 'key' => 'date', 'value' => '16/06/2020', ), array( 'key' => 'aanvangsttijd', ), );
$act_metaquery = array( 'relation' => 'AND', array( 'key' => 'date', 'value' => '16/06/2020', ), array( 'key' => 'aanvangsttijd', ), );