function exclude_old_events( $query ) {
if ( $query->is_search ) {
$yesterday_before_midnight = date(“Y-m-d”, mktime(0, 0, 0, date(“m”),date(“d”)-1,date(“Y”))).’ 23:59:59′;
$meta = array(
array(
‘key’ => ‘_EventStartDate’,
‘value’ => $yesterday_before_midnight,
‘compare’ => ‘>’
)
);
$query->set( ‘meta_query’, $meta );
}
}
add_action( ‘pre_get_posts’, ‘exclude_old_events’ );