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Event Sponsor

// WP_Query arguments
$args = array(
	'post_type'              => array( 'event-sponsor' ),
	'meta_query'             => array(
		'relation' => 'OR',
		array(
			'key'     => 'sponsor_expiry',
			'value'   => '22/01/2024',
			'compare' => '>=',
			'type'    => 'DATE',
		),
		array(
			'key'     => 'event_sponsor',
			'compare' => 'NOT EXISTS',
			'type'    => 'DATE',
		),
		array(
			'key'     => 'sponsor_expiry',
			'value'   => '''',
			'compare' => '=',
			'type'    => 'DATE',
		),
	),
);

// The Query
$query = new WP_Query( $args );

// The Loop
if ( $query->have_posts() ) {
	while ( $query->have_posts() ) {
		$query->the_post();
		// do something
	}
} else {
	// no posts found
}

// Restore original Post Data
wp_reset_postdata();