title: Prevent email clients from creating calendar links in messages
body: <p>I am sending an email messages from a PHP script and some email clients parse date strings within the message and create clickable calendar "links". One example is Airmail for OSX. I am sure there are many others that do the same. I see 2 problems with this:</p>
  
  <ul>
  <li>The links are shown even though they actually don't exist</li>
  <li>I can't style them. Actually, I don't even know if they are going to be created and where.</li>
  <li>Anchor CSS rules are not respected for those links and they usually end up very ugly.</li>
  </ul>
  
  <p>My current workaround is <code>date('Y-&amp;#8203;m-&amp;#8203;d')</code>, but honestly this is some ugly code and I am not even sure if it works with all email clients. </p>
  
  <p>I am looking for a reliable way to make sure that dates are displayed properly (meaning: the way I created them) everywhere.</p>