Mysql Php Email Every Year

Question

I have been scratching my head on this one for awhile. I need to send out an email on certain days after someone registers with my site.

Day of registration (Set up) 1 month 3 months 6 months 1 year and every year after

Right now an automatic email goes out the day of registration. That works fine but now I need one after 1 month and so on. The months I think I understand. It is just comparing the date to the registered on date, and then the yearly message I have no idea. I am still learning how to do this so any help would be great thanks!

//get status of email queue
$q_lock = getLockStatus($conexao, 5);

//if email queue is locked, exit the script
if($q_lock)
{
exit();
}
//if email queue is not locked, lock it now and continue
else
{
setLockStatus($conexao, 5, 1);
}

$aryQueue = getMemberemails($conexao);
$date = date("Y-m-d");
$current_year = date("Y");
//echo '<pre>', print_r($aryQueue, true), '</pre>';

foreach($aryQueue as $e)
{
$email_id = $e["id"];
$full_name = $e["full_name"];
$to_name = $e["first_name"];
$email= $e["email"];
$member_id = $e["member_id"];
$registered_on = $e["registered_on"];
$yearly_message = date('Y-m-d', strtotime("$registered_on + 1 year"));
$oneYearOn = date('Y-m-d',strtotime(date("Y-m-d", mktime()) . " + 365 
day"));



if( $date == $yearly_message){