Anniversary mail

add_filter( 'app_message_headers', 'custom_headers_anv' );

function custom_headers_anv( $message_headers ){
$message_headers .= "Content-type:text/html;charset=UTF-8" . "\r\n";
return  $message_headers;
}
    function annv_follow_up( $value ) {
    global $wpdb, $appointments;

    $a = $appointments;
    // Double check if A+ is active
    if ( !is_object( $a ) )
    return;

    // Follow up time in hours
    $month = 11;
    // Follow up email subject
    $subject = 'We Would Like to Hear From You!';
    // Follow up email message
    $message = '<center><img src="http://kidsclub4fun.com/newsite/wp-content/uploads/2015/05/kidsclublogo-hi-res.jpg" width="221" height="129"></center><br />
<br />Thank you for having your party with Kids Club Fun and Fitness. We would like to see how we did! Below is a link to a survey that will let us know how our performance was.<br />
 <br />
<a href="http://kidsclub4fun.com/birthday-party-customer-feedback/">Birthday Party Feedback</a><br />
 <br />
Warm Regards,<br />
Kids Club Fun and Fitness<br />
(360)-546-5437';

    $results = $wpdb->get_results( "SELECT * FROM " . $a->app_table . " WHERE note NOT LIKE '%Follow up sent%' AND

status='completed' AND DATE_ADD(created, INTERVAL ".$month." MONTH) <'" . date ("Y-m-d H:i:s", $a->local_time ). "' " );
    if ( $results ) {
    foreach ( $results as $r ) {
    // Send email
    if ( wp_mail( $r->email, $subject, $message, $a->message_headers() ) ) {
    // Save so that we don't send email again
    $wpdb->update ( $a->app_table,
    array( 'note' => $r->note . ' Anniversary reminder sent' ),
    array( 'ID' => $r->ID ),
    array ( '%s' )
    );
        // Log here for better results
        $appointments->log ( sprintf( "Follow up email sent to %s for appointment ID %s" , $r->email , $r->ID ) ) ;
    }
    }
    }
    }
    add_action( 'update_option_app_last_update', 'annv_follow_up' );